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Simple, Synchronous Voltage Mode PWM Controller
POWER MANAGEMENT Description
The SC2608A is a versatile voltage-mode PWM controller designed for use in step down DC/DC power supply applications. A simple, fixed frequency, highly efficient buck regulator can be implemented using the SC2608A with minimal external components. The input voltage range is from +5V to +12V. Internal level shift and drive circuitry eliminates the need for an expensive P-channel, high-side MOSFET. The small device footprint allows for compact circuit design. SC2608A features include temperature compensated voltage reference, triangle wave oscillator, current limit comparator, and an externally compensated error amplifier. Current limit is implemented by sensing the voltage drop across the bottom MOSFET RDS(ON). The SC2608A operates at a fixed frequency of 250kHz providing an optimum compromise between efficiency , external component size, and cost. SC2608A has a thermal protection circuit, which is activated if the junction temperature exceeds 150 OC.
SC2608A
Features
+5V or +12V input voltage 250kHz operation High efficiency (>90%) 1.5% Reference voltage accuracy Hiccup mode over current protection Robust output drive RDS(ON) Current sensing for protection Industrial temperature range SO-8 package Integrated boot strap diode Thermal Shut down Fully WEEE and RoHS Compliant
Applications
Termination supplies Low cost microprocessor supplies Peripheral card supplies Industrial power supplies High density DC/DC conversion
Typical Application Circuit
SC2608
SC2608A
sense COMP/SS SENSE
+12V/+5V/+3.3V +12V
GND VCC
DL
PHASE
DH
BST
VOUT sense
Figure 1
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SC2608A
POWER MANAGEMENT Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied.
P ar am e t e r VCC to GND BST to PHASE BST to GND PHASE to GND (note1) DH to PHASE
(note1)
S y m b ol
M ax i m u m +20 +15 +35 -1 to +24 +15 -1 to +15 +7 +7
Un i ts V V V V V V V V
O O
DL to GND (note2) COMP/SS to GND SENSE to GND Thermal Resistance Junction to Case Thermal Resistance Junction to Ambient Op erating Temp erature Range Storage Temp erature Range ESD Rating (Human Body Model) qJC qJA TJ TSTG ESD
40 120 -40 to +125 -65 to +150 2
C/W C/W
O O
C C
kV
Note 1: Under pulsing condition, the peak negative voltage can not be lower than -3.6V with less than 20nS from 50% to 50%. Note 2: Under pulsing condition, the peak negative voltage can not be lower than -5V with less than 20nS from 50% to 50%.
Electrical Characteristics
Unless specified: VCC = 12V, VBST - VPhase = 12 V, VOUT = 3.3V, TJ = TA = 25oC.
P a r a m et er P ow er Su p p l y Supply Voltage Supply Current E r r or A m p l i f i er Feedback Voltage
Sym b ol
C on d i t i on s
Mi n
Typ
Ma x
Un i ts
VCC ICC VCOMP < 0.4V
4.5 6
14
V mA
V FB
4.75V0.788
0 .8 0.8 7 60 1
0.812
V V mS dB
E/A Transconductance Open Loop DC Gain Input Bias Current Output Sink Current Output Source Current
Gm AO IFB ISINK ISOURCE VSENSE > 0.9V; VCOMP = 2.1V VSENSE < 0.7V; VCOMP = 2.1V
2
3
uA uA uA
-700 120
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SC2608A
POWER MANAGEMENT Electrical Characteristics
Unless specified: VCC = 12V, VBST - VPhase = 12 V, VOUT = 3.3V, TJ = TA = 25oC.
P ar am e t e r O s ci l l at o r Switching Frequency Ramp Peak Voltage Ramp Valley Voltage Maximum Duty Cycle M O S F E T Dri v ers DH Sink/Source Current DL Sink/Source Current DH Rise/Fall Time DL Rise/Fall Time Dead Time DL Minimum On Time Cu rren t L i m i t Trip Voltage S o f t - S t ar t SS Source Current SS Sink Current U n d e r v o l t ag e L o ck o u t UVLO Threshold T h e r m al S h u t d o w n Over Temp erature Trip Point
S y m b ol
Con d i t i on s
Mi n
Ty p
M ax
Un i ts
FOSC V P -K VV DMAX
Vcc =12V 4.75V < VCC < 12.6V 4.75V < VCC < 12.6V 250kHz
225
250 1.8 0.8 85
275
kHz V V %
IDH IDL tr, tf tr, tf td t tON
tPW > 400nS VGS = 4.5V (src) VGS = 2.5V (snk) CL = 3000p F, See Fig. 2 CL = 4000p F, See Fig. 2 See Fig. 2 4.75V < Vcc < 12.6V
0.6 0.6
0.8 0.7 50 50 80 400
A
A ns ns ns ns
V T R IP
4.75V < Vcc < 12.6V Vtrip = VPHASE - GND
-400
-350
-300
mV
ISRC ISNK
VCOMP < 2.5V VCOMP > 0.5V
6 -6
uA uA
V th
-40< TJ < 85OC
3.9
4.1
4.3
V
TOTP
150
o
C
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SC2608A
POWER MANAGEMENT Gate Drive Timing Diagram
Figure 2
Block Diagram
VCC
BST DH PHASE
OSC S + REF 0.8V R Q
LEVEL SHIFT
E/A
+
NON-OVERLAP TIMING
0 PWM
VCC OCP & UVLO
SENSE
-
Vcc DL GND
0
OCP
PHASE
+ 0
0
COMP/SS
Figure 3
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SC2608A
POWER MANAGEMENT Pin Configuration
Top View
Ordering information
Device
(1 )
Package SO-8 Evaluation Board
Temp Range (TJ) -40 to 125OC
SC2608ASTRT(2)
BST DH GND DL
1 2 3 4
(8-Pin SO-8)
8 7 6 5
PHASE COMP/SS SENSE VCC
SC2608AEVB
Notes: (1) Only available in tape and reel packaging. A reel contains 2500 devices. (2) This device is fully WEEE and RoHS Compliant
Pin Descriptions
Pin # 1 2 3 4 5 6 P i n N am e BST DH GN D DL VCC Sense COMP/SS PHASE Bootstrap for high side driver. High side driver outp ut. Ground. Low side driver outp ut. Chip bias sup p ly p in. Outp ut voltage sense inp ut. Error amp lifier outp ut. Connect comp ensation network to GN D. The comp ensation cap acitor serves as soft star t cap acitor. By p ulling this p in low will disable the outp ut. Connect this p in to the switching node between the MOSFETs. P i n Fu n c t i o n
7
8
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SC2608A
POWER MANAGEMENT Theory of Operation
Synchronous Buck Converter The output voltage of the synchronous converter is set and controlled by the output of the error amplifier. The inverting input of the error amplifier receives its voltage from the SENSE pin. The non-inverting input of the error amplifier is connected to an internal 0.8V reference. The error amplifier output is connected to the compensation pin. The error amplifier generates a current proportional to (0.8V-Vsense), which is the COMP pin output current (Transconductance ~ 7mS). The voltage on the COMP pin is the integral of the error amplifier current. The COMP voltage is the non-inverting input of the PWM comparator and controls the duty cycle of the MOSFET drivers. The compensation network controls the stability and transient response of the regulator. The larger capacitor, the slower COMP voltage changes, and slower the duty cycle changes. The non-inverting input voltage of the PWM comparator is the triangular ramp signal generated from the oscillator. The peak-to-peak voltage of the ramp is 1V, this is a parameter used in control loop calculation. When the oscillator ramp signal rises above the COMP voltage, the comparator output goes high and the PWM latch is reset. This pulls DH low, turning off the high-side MOSFET. After a short delay (dead time), DL is pulled high, turning on the low-side MOSFET. The oscillator also produces a set pulse for the PWM latch to turn off the low-side MOSFET, After a delay time, DH is pulled high to turn on the highside MOSFET. The delay time is determined by a monostable on the chip. The triangle wave minimum is about 0.8V, and the maximum is about 1.8V. Thus, if Vcomp = 0.7V, high side duty cycle is the minimum (~0%) , but if Vcomp is 1.8V, duty cycle is at maximum ( ~90%).The internal oscillator uses an on-chip capacitor and trimmed precision current sources to set the oscillation frequency to 250kHz. Figure 1 shows a 2.5V output converter. If the Vout <2.5V, then the SENSE voltage < 0.8V. In this case the error amplifier will be sourcing current into the COMP pin so that COMP voltage and duty cycle will gradually increase.If Vout > 2.5V, the error amplifier will sink current and reduce the COMP voltage, so that duty cycle will decrease.The circuit will be in steady state when Vout =2.5V , Vsense = 0.8V, Icomp = 0. The COMP voltage and duty cycle depend on Vin. outputs remain in the off state whenever the supply voltage drops below the set threshold. Lockout occurs if VCC falls below 4.1V typ. Soft Start The SC2608A provides a soft start function to prevent large inrush currents upon power-up or hiccup retry. If both COMP and SENSE pins are low (<300mV), the device enters soft start mode, and the compensation capacitor is slowly charged by an internal 6uA current source. When the COMP pin reaches 300mV, the low side FET is switched on in order to refresh the bootstrap capacitor, and begin PWM from a known state. As the COMP pin rises above 800mV, PWM begins at minimum duty cycle. COMP continues to charge, slowly sweeping the device through the duty cycle range until FB reaches the regulation point of 800mV. Once FB reaches the regulation point, the soft start current is switched off, and the strong error amp is enabled, providing a glitch-free entrance into closed loop operation. The overcurrent comparator is still active during soft start mode, and will override soft start in the event that an overcurrent is detected, such as startup into a dead short. R DS(ON) Current Limiting In case of a short circuit or overload, the low-side (LS) FET will conduct large currents. To protect the regulator in this situation, the controller will shut down the regulator and begin a soft start cycle later. While the LS driver is on,the Phase voltage is compared to the OCP trip voltage. If the phase voltage is lower than OCP trip voltage, an over current condition is detected. The low-side Rdson sense is implemented at end of each LS-FET turn-on duration. The minimum turn-on time of the LS-FET is set to be 400nS. This will ensure the sampled signal is noise free by giving enough time for the switching noise to die down.
OCP Hiccup In the event that an overcurrent is detected, the SC2608A latches the fault and begins a hiccup cycle. Switching is immediately stopped, and the drivers are set to a tristate condition (Both DH and DL are low). COMP is slowly discharged to 300mV with an internal 6uA current source, providing a long cooldown time to keep power dissipation low in the event of a continuous dead short. Once COMP and SENSE both fall below the 300mV threshold, the part Voltage Lockout U nder V oltage Lock out re-enables the 6uA soft start current , and the device begins The under voltage lockout circuit of the SC2608A as- a normal startup cycle again. sures that both high-side and low-side MOSFET driver
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SC2608A
POWER MANAGEMENT Applications Information (Cont.)
A note to the user is needed: The device cannot restart until both COMP and SENSE are low, to prevent start up into a charged output. In the event of an overcurrent condition, the output is quickly discharged by the load, therefore bringing SENSE below the 300mV threshold. If the COMP pin is pulled low by an external device (such as an open-drain logic gate used for system shutdown), and SENSE is high(above 300mV) while COMP is low, then the SC2608A turns on the low side FET to discharge the output before changing to shutdown or soft-start mode. The low side FET turns off when SENSE drops below 300mV and the converter remains in the tri-state condition until COMP is released. Although this shutdown technique can be used successfully on the SC2608A, the system designer using COMP for external shutdown will need to consider the load on the low side FET when discharging the output capacitor bank. For large capacitor bank, this peak current can be quite large as it is limited only by the RDS(ON) of the low side FET. Fortunately the duration of this event is quite short, and has been shown in the lab to have no detrimental effect on the performance of the external FETs. Disabling the output by pulling down COMP/SS pin is only recommended when the output capacitor bank is not too large. Compensation Network Design
G pwm =
1 Vramp
where the ramp amplitude is fixed at 1 volts. The total control loop-gain can then be derived as follows:
V 1 + sRcCo T (s ) = Gm * G pwm * Vin * bg * H c (s ) * V R L o 1 + s RcCo + + s 2 LCo 1 + c R Ro o
H c (s ) = 1 1 R+ 1 sC + sC i
The task here is to properly choose the compensation network for a nicely shaped loop-gain Bode plot. The following design procedures are recommended to accomplish the goal: (1) Calculate the corner frequency of the output filter:
Fo = 2
(2) Calculate the ESR zero frequency of the output filter capacitor:
Fesr = 1 2 R c C o
F SW 5
1 LC o
(3) Check that the ESR zero frequency is not too high.
F esr <
E/A
VBG 0.8V
G_PWM
L Rc VIN Ro
R Ci C
R1 R2
Co
Fig. 4. SC2608A small signal model.
The control model of SC2608A is depicted in Fig. 4. This model can also be used to generate loop gain Bode plots. The bandgap reference is 0.8V and trimmed to +/-1% accuracy. The desired output voltage can be achieved by setting the resistive divider network, R1 and R2. The error amplifier is transconductance type with fixed 0 . 007 A gain of:
Gm =
If this condition is not met, the compensation structure may not provide loop stability. The solution is to add some electrolytic capacitors to the output capacitor bank to correct the output filter corner frequency and the ESR zero frequency. In some cases, the filter inductance may also need to be adjusted to shift the filter corner frequency. It is not recommended to use only high frequency multi-layer ceramic capacitors for output filter. (4) Choose the loop gain cross over frequency (0 dB frequency). It is recommended that the crossover frequency is always less than one fifth of the switching frequency : 1 FX _ OVER = * FSW 5 If the transient specification is not stringent, it is better to choose a crossover frequency that is less than one tenth of the switching frequency for good noise immunity. The resistor in the compensation network can then be calculated as: when
V F F 1 R= * esr * X _ OVER * o F F Gpwm *Vin * Gm o esr Vbg
2
The compensation network includes a resistor and a capacitor in series, which terminates the output of the error amplifier to the ground. The PWM gain is inversion of the ramp amplitude, and this gain is given by:
V
F o < F esr <
F sw 5
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SC2608A
POWER MANAGEMENT Applications Information (Cont.)
(5) The compensation capacitor is determined by choosing the compensator zero to be about one fifth of the output filter corner frequency:
F zero
C=
An example is given below to demonstrate the procedure introduced above. Vin=12V Vo=2.5V Io=15A Fsw=250KHz L=2.2uH set C i=1nF Rc=1.33K C=327.95nF set to Rc=1.5K set to C=100nF C o=4400uF R c=0.009 Vbg=0.8V Vramp=1V Gm=0.007A/V
F =o 5
1 2R * Fzero
SC2608A soft start time is determined by the compensation capacitor. Capacitance can be adjusted to satisfy the soft start requirement. (6) The final step is to generate the Bode plot by using the simulation model in Fig. 4 or using the equations provided here with Mathcad. The phase margin can then be checked using the Bode plot.
100
for suitable soft start time
Loop Gain Mag (dB)
50 mag( i) 0
50 10 100
1 .10
3
1 .10 Fi
4
1 .10
5
1 .10
6
Loop Gain Phase (Degree)
0
45
phase ( i) 90
135
180 10 100
1 .10
3
1 .10 Fi
4
1 .10
5
1 .10
6
Fig. 5. Bode plot of the loop
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SC2608A
POWER MANAGEMENT
Typical Performance Characteristics
V re f vs. Te m p e ra ture
F re q ue nc y vs . Te m p e ra ture
0 .8 3
Frequency (kHz)
270 260 250 240 230 220
0 .8 2 Vref(V) 0 .8 1 0 .8 0 0 .7 9 -5 0 -2 5 0 25 50
o
75
100
125
-5 0
-2 5
0
25
50
o
75
100
125
Te mpe ra ture ( C )
Te mpe ra ture ( C )
I_ lim it vs. Te m p e ra ture
U V L O vs . Te m p e ra ture
390 380
I_limit trip (mV)
4 .2 5 4 .2 0 UVLO (V)
-5 0 -2 5 0 25 50
o
370 360 350 340 330 320 75 100 125
4 .1 5 4 .1 0 4 .0 5 4 .0 0 -5 0 -2 5 0 25 50
o
75
100
125
Te mpe ra ture ( C )
Te mpe ra ture ( C )
G a te d rive r d e a d tim e vs . Te m p e ra ture
Ic c vs . Te m p e ra ture
40
Gate driver dead time (ns)
15 14 Icc (mA) 13 12 11 10 9 8 7
30
20
10 -5 0 -2 5 0 25 50
o
75
100
125
-5 0
-2 5
0
25
50
o
75
100
125
Te m pe ra ture ( C )
Te m pe ra ture ( C )
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SC2608A
POWER MANAGEMENT Application Information Typical Typical Application Schematic
+12V/+5V/+3.3V
Q1 IP B09N 03LA
C1 4.7uF /16V
C2 1500uF /16V
C3 1500uF /16V
R1 2R2 C4 100pF U1 8 7 R2 1k Sense +12V R5 1R C6 68nF 6 5 C13 1uF/16V Phase BST 1 2 3 4 C5 1uF/16V
2.5VOUT/15A L11.2uH Q2 IP B13N 03LA R4 1R C12 2.2n C7 2200uF /6.3V C8 2200uF /6.3V C9 4.7uF /6.3V C10 4.7uF /6.3V C11 4.7uF /6.3V R3 1k Sense R6 1k
COMP/SS DH SENSE GND VCC DL
SC2608A
VOUT=0.8V X (R3+R6)/R6
Bill of Materials
Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Qu an ti ty 1 2 1 2 1 2 3 1 1 1 1 1 1 2 2 1 Referen ce C1 C2,C3 C4 C5,C13 C6 C7,C8 C9,C10,C11 C12 L1 Q1 Q2 R1 R2 R3,R6 R4,R5 U1 Par t 4.7u F/16V 1500u F/16V 100p F/50V 1u F/16V 68n F/25V 2200u F/6.3V 4.7u F/6.3V 2.2n F 1.2u H IPD09N 03LA IPD13N 03LA 2R2 1K 1K, 1% 1R0 SC2608A Ven d er A ny Pan ason i c FJ A ny A ny A ny Pan ason i c FJ A ny A ny A ny In fi n eon In fi n eon A ny A ny A ny A ny SEMTECH
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SC2608A
POWER MANAGEMENT
Typical Performance Characteristics
Efficiency V. S. Load Current 95 94 93 92 91 90 89 88 87 86 85 0 2 4 6 8 10 12 14 16 18 20
Start up
Vin Comp/ SS
DL
VO
Transient Response
Over Current Protection (21A DC tripped)
Vin
COMP/SS VOUT
Comp/ SS
DL
IL(10A/DIV)
VO
5 -18 A step load Gate waveforms OCP HICCUP
Vin
DH
Comp/ SS
Phase node
DL
DL
VO
15 A sustain loading (c)
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SC2608A
POWER MANAGEMENT Application Information
Typical Typical DDR VDDQ Application Schematic
5VDual
Q1 IP B 09N 03LA
C1 4.7uF /16V
C2 1500uF /16V
C3 1500uF /16V
C4 1500uF /16V
R1 2.2R C5 100pF U1 8 7 R2 1k 5VDual C7 68nF Sense 6 5 D1 BAT54H D2 1N4148 +12V C15 1uF/16V Phase BST 1 2 3 4 C6 1uF/16V
1.8VOUT/24A L1 1.2uH/40A
IP B 09N 03LA
1800uF /6.3V
1800uF /6.3V
1800uF /6.3V
COMP/SS DH SENSE GND VCC SC2608A DL
Q2 R4 2R2 C14 1n
C8
C9
C10
C11 4.7uF /6.3V
C12 C13 4.7uF /6.3V 4.7uF /6.3V
R3 1.27k Sense R5 1k
Bill of Materials
Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Qu an ti ty 4 3 1 2 1 3 1 1 1 1 1 1 2 1 1 1 1 Referen ce C1,C11,C12,C13 C2,C3,C4 C5 C6,C15 C7 C8,C9,C10 C14 D1 D2 L1 Q1 Q2 R1,R4 R2 R3 R5 U1 Par t 4.7u F/6.3V 1500u F/6.3V 100p F/50V 1u F/16V 68n F/25V 1800u F/6.3V 1n F/50V B AT54H 1N 4148 1.2u H/40A IPD09N 03LA IPD09N 03LA 2R2 1K 1.27K, 1% 1K, 1% SC2608A Ven d er A ny Pan ason i c FJ A ny A ny A ny Pan ason i c FJ A ny A ny A ny A ny In fi n eon In fi n eon A ny A ny A ny A ny SEMTECH
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SC2608A
POWER MANAGEMENT Application Information
Typical Input Voltage Typical High Input Voltage Application Schematic
20VIN Q1 IPD 13N 03LA
C1 4.7uF /25V
C2 1000uF /25V L1
R1 0R R2 5R1 BST 1 2 3 4 C10 2.2nF C4 1uF/16V
C3 10pF/Opt.
U1 8 7 Phase
5VOUT/8A
2200uF /6.3V
1K
4.7uF /6.3V
C5 68n
Sense R6 1KR/1206 Vin D1 8.2V
SENSE GND VCC DL SC2608A
5
C9 1n
4.7uF /6.3V
6
IPD 13N 03LA
R3
COMP/SS DH
Q2 R4 2R2
2.2uH C6 C7 C8 R5 5.25K Sense R7 1k
1KR/1206 R7
C11 1uF/16V
Bill of Materials
Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Qu an ti ty 1 1 1 2 1 1 2 1 1 1 1 1 1 1 1 2 1 1 2 1 Referen ce C1 C2 C3 C4,C11 C5 C6 C7,C8 C9 C10 D1 L1 Q1 Q2 R1 R2 R3,R7 R4 R5 R6,R7 U1 Par t 4.7u F/25V 1000u F/25V 10p F/50V , Op t. 1u F/16V 68n F/16V 2200u F/6.3V 4.7u F/6.3V 1n F/50V 2.2n F/50V Zen er 8.2V 2.2u H/15A IPD13N 03LA IPD13N 03LA 0R 5.1R 1.K, 1% 2R2 5.25K, 1% 1KR, 1206 SC2608A Ven d er A ny Pan ason i c FJ A ny A ny A ny Pan ason i c FJ A ny A ny A ny Any A ny In fi n eon In fi n eon A ny A ny A ny A ny A ny A ny SEMTECH
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SC2608A
POWER MANAGEMENT Outline Drawing - SO-8
D IM E N S IO N S M IL L IM E T E R S IN C H E S M IN N O M M A X M IN N O M M A X
.0 6 9 .0 1 0 .0 6 5 .0 2 0 .0 1 0 .1 9 7 .1 9 3 .1 5 7 .1 5 4 .2 3 6 B S C .0 5 0 B S C .0 1 0 .0 2 0 .0 4 1 .0 2 8 .0 1 6 (.0 4 1 ) 8 8 0 .0 0 4 .0 1 0 .0 0 8 .0 5 3 .0 0 4 .0 4 9 .0 1 2 .0 0 7 .1 8 9 .1 5 0 1 .3 5 0 .1 0 1 .2 5 0 .3 1 0 .1 7 4 .8 0 3 .8 0 1 .7 5 0 .2 5 1 .6 5 0 .5 1 0 .2 5 5 .0 0 4 .9 0 4 .0 0 3 .9 0 6 .0 0 B S C 1 .2 7 B S C 0 .2 5 0 .5 0 0 .4 0 1 .0 4 0 .7 2 (1 .0 4 ) 8 0 8 0 .1 0 0 .2 5 0 .2 0
A e N 2 X E /2 E1 E D
D IM
A A1 A2 b c D E1 E e h L L1 N 01 aaa bbb ccc
1 ccc C 2 X N /2 T IP S
2 e /2 B D
aaa C A2 S E A T IN G PLANE C bxN bbb A1 C A -B D GAGE P LA N E 0 .2 5 S E E D E T A IL S ID E V IE W
NO TES: 1. 2. 3. C O N T R O L L IN G D IM E N S IO N S A R E IN M IL L IM E T E R S (A N G L E S IN D E G R E E S ). DATUM S -A AND -B T O B E D E T E R M IN E D A T D A T U M P L A N E -H -
A
h h H c
A
D E T A IL
L (L 1 )
01
A
D IM E N S IO N S "E 1 " A N D "D " D O N O T IN C L U D E M O L D F L A S H , P R O T R U S IO N S OR GATE BURRS.
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SC2608A
POWER MANAGEMENT Land Pattern - SO-8
X
DIM
(C) G Z C G P X Y Z
DIMENSIONS INCHES MILLIMETERS
(.205) .118 .050 .024 .087 .291 (5.20) 3.00 1.27 0.60 2.20 7.40
Y P
NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET.
2. REFERENCE IPC-SM-782A, RLP NO. 300A.
Contact Information
Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 (c)
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