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Low Dropout Dual Voltage Regulator
The LM2935 is a dual positive 5.0 V low dropout voltage regulator, designed for standby power systems. The main output is capable of supplying 750 mA for microprocessor power, and can be turned "on" and "off" by the switch/reset input. The other output is dedicated for standby operation of volatile memory, and is capable of supplying up to 10 mA loads. The total device features a low quiescent current of 3.0 mA or less when supplying 10 mA from the standby output. This part was designed for harsh automotive environments and is therefore immune to many input supply voltage problems such as reverse battery (-12 V), double battery (+24 V), and load dump transients (+60 V). * Two Regulated 5.0 V Outputs
LM2935
LOW DROPOUT DUAL VOLTAGE REGULATOR
SEMICONDUCTOR TECHNICAL DATA
* * * * * * * *
Main Output Current in Excess of 750 mA On/Off Control of Main Output Standby Output Current in Excess of 10 mA Low Input/Output Differential of Less than 0.6 V at 500 mA Short Circuit Current Limiting Internal Thermal Shutdown Low Voltage Indicator Output Designed for Automotive Environment Including * Reverse Battery Protection * Double Battery Protection * Load Dump Protection * Reverse Transient Protection Economical 5-Lead TO-220 Package with Two Optional Leadforms Also Available in Surface Mount D2PAK Package
TH SUFFIX PLASTIC PACKAGE CASE 314A
1 5
1 5
TV SUFFIX PLASTIC PACKAGE CASE 314B
* *
Heatsink surface connected to Pin 3.
T SUFFIX PLASTIC PACKAGE CASE 314D
1 5
ORDERING INFORMATION
Device LM2935D2T LM2935T LM2935TH LM2935TV 40 125C TJ = -40 to +125C Operating Temperature Range Package Surface Mount Plastic Power Horizontal Mount Vertical Mount
1
Pin 1. Input Voltage/VCC 2. Main Output 3. Ground 4. Switch/Reset 5. Standby/Output
D2T SUFFIX PLASTIC PACKAGE CASE 936A (D2PAK)
5
Heatsink surface (shown as terminal 6 in case outline drawing) is connected to Pin 3.
(c) Motorola, Inc. 1996
Rev 1
MOTOROLA ANALOG IC DEVICE DATA
1
LM2935
Typical Application Circuit
Main Output 1 S1* *The main output is "Off" with switch S1 open. 0.1 LM2935 20 k Standby Switch/ Reset 4 3 Gnd 5 + 10 5.0 V/10 mA 2 + 10 5.0 V/750 mA
Input Vin
An input bypass capacitor is recommended if the regulator is located more than 4 from the supply input filter. The LM2935 is not internally compensated and thus requires an external output capacitor for stability. A minimum capacitance of 10 F is recommended. The actual capacitance value is dependent upon load current, temperature, and the capacitor's equivalent series resistance (ESR). The least stable condition is encountered at maximum load current and minimum ambient temperature. This device contains 29 active transistors.
MAXIMUM RATINGS
Rating Input Voltage Continuous Transient Reverse Polarity Input Voltage 1.0% Duty Cycle, 100 ms Switch/Reset Input Current Power Dissipation Case 314A, 314B and 314D (TO-220 Type) TA = 25C Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case Case 936A (D2PAK) TA = 25C Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case Operating Junction Temperature Range Storage Temperature Range Symbol VI -VI() Iin Value 60 - 50 5.0 Unit Vdc Vpk mA
PD RJA RJC PD RJA RJC TJ Tstg
Internally Limited 65 5.0 Internally Limited Per Figure 1 5.0 - 40 to +150 - 65 to +150
W C/W C/W W C/W C/W C C
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 500 mA, Istby = 0 mA, CO = 10 F, Cstby = 10 F, TJ = 25C [Note 1].)
Characteristic MAIN OUTPUT Output Voltage (Vin = 6.0 V to 26 V, IO = 5.0 mA to 500 mA, TJ = - 40 to +125C) Line Regulation Vin = 9.0 V to 16 V, IO = 5.0 mA Vin = 6.0 V to 26 V, IO = 5.0 mA Load Regulation (IO = 5.0 mA to 500 mA) Output Impedance IO = 500 mAdc and 10 mArms, f = 100 Hz to 10 kHz Output Noise Voltage (f = 10 Hz to 100 kHz) Long Term Stability VO Regline - - Regload ZO - Vn S - - 200 100 20 - - - Vrms mV/kHR - 4.0 10 10 25 50 50 mV m 4.75 5.0 5.25 V mV Symbol Min Typ Max Unit
2
MOTOROLA ANALOG IC DEVICE DATA
LM2935
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 500 mA, Istby = 0 mA, CO = 10 F, Cstby = 10 F, TJ = 25C [Note 1].)
Characteristic MAIN OUTPUT (continued) Ripple Rejection (f = 120 Hz) Dropout Voltage IO = 500 mA IO = 750 mA Short Circuit Current Limit Over-Voltage Shutdown Threshold SWITCH/RESET Output Sink Current (VOL = 1.2 V) Output Voltage (Ron/off = 20 k) Low State, Vin = 4.0 V High State, Vin = 14 V Output Pull-Up Resistor, "On"/"Off" (Note 2) Output Voltage with Reverse Polarity Input (Vin = -15 V, RL = 10 ) ISink VOL VOH Ron/off -VO - - 4.5 - - 0.6 5.0 0.9 5.0 20 0 - 1.2 6.0 30 - k V mA V RR VI-VO - - ISC Vth(OV) 0.75 26 0.45 0.82 1.2 31 0.6 - - - A V - 66 - dB V Symbol Min Typ Max Unit
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 0 mA, Istby = 10 mA, CO = 10 F, Cstby = 10 F, TJ = 25C [Note 1].)
Characteristic STANDBY OUTPUT Output Voltage (Vin = 6.0 V to 26 V, Istby = 1.0 mA to 10 mA, TJ = -40 to +125C) Tracking Voltage Line Regulation (Vin = 6.0 V to 26 V) Load Regulation (Istby = 1.0 mA to 10 mA) Output Impedance I(stby) = 10 mAdc and 1.0 mArms, f = 100 Hz to 10 kHz Output Noise Voltage (f = 10 Hz to 100 kHz) Long Term Stability Ripple Rejection (f = 120 Hz) Dropout Voltage (Istby = 10 mA) Short Circuit Current Limit Output Voltage with Reverse Polarity Input Vin = -15 V, RL = 510 Output Voltage with Maximum Positive Input Vin = 60 V, RL = 510 TOTAL DEVICE Bias Current IO = 10 mA, Istby = 0 mA IO = 500 mA, Istby = 0 mA IO = 750 mA, Istby = 0 mA Main Output "Off", Istby = 10 mA IB - - - - 3.0 40 90 2.0 - 100 - 3.0 mA VO(stby) VO-VO(stby) Regline Regload ZO(stby) - Vn S RR VI-VO(stby) ISC -VO - 0.3 VO(max) - 5.0 6.0 0 - V - - - - 25 1.0 300 20 66 0.55 70 - - - - 0.7 - Vrms mV/kHR dB V mA V 4.75 - 200 - - 5.0 0 4.0 10 5.25 200 50 50 V mV mV mV Symbol Min Typ Max Unit
NOTES: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 2. The maximum switch/reset current must not exceed 5.0 mA.
MOTOROLA ANALOG IC DEVICE DATA
3
LM2935
TYPICAL CIRCUIT WAVEFORMS
60 V Vin, Input Voltage (Pin 1) S1, "On"/"Off" Switch Open 5.0 V VO, Main Output Voltage (Pin 2) 5.0 V Reset (Pin 4) Vstby, Standby Voltage (Pin 5) 0V 5.0 V Main Output Turn "On" Load Dump 2.4 V Low Input Voltage Input Voltage Line Noise 5.0 V Main Output Short Circuit Main Output Turn "Off" Thermal Shutdown 5.0 V 2.4 V 14 V 14 V 3.0 V 9.0 V Closed 5.0 V 0V 5.0 V 5.0 V Open
26 V 14 V
Figure 1. D2PAK Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length
PD(max) for TA = 50C 70 60 50 40 RJA 30 0 5.0 10 15 20 Free Air Mounted Vertically 3.0 2.0 oz. Copper L 2.5 2.0 1.5 1.0 PD, MAXIMUM POWER DISSIPATION (W) 80 R JA, THERMAL RESISTANCE JUNCTION-TO-AIR ( C/W) 3.5
Minimum Size Pad
L, LENGTH OF COPPER (mm)
4
IIII IIII IIII IIII
L 25
30
MOTOROLA ANALOG IC DEVICE DATA
LM2935
OUTLINE DIMENSIONS
TH SUFFIX PLASTIC PACKAGE CASE 314A-03 ISSUE D
-P- B Q
OPTIONAL CHAMFER
-T- C E
SEATING PLANE
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION D DOES NOT INCLUDE INTERCONNECT BAR (DAMBAR) PROTRUSION. DIMENSION D INCLUDING PROTRUSION SHALL NOT EXCEED 0.043 (1.092) MAXIMUM. INCHES MIN MAX 0.572 0.613 0.390 0.415 0.170 0.180 0.025 0.038 0.048 0.055 0.570 0.585 0.067 BSC 0.015 0.025 0.730 0.745 0.320 0.365 0.140 0.153 0.210 0.260 0.468 0.505 MILLIMETERS MIN MAX 14.529 15.570 9.906 10.541 4.318 4.572 0.635 0.965 1.219 1.397 14.478 14.859 1.702 BSC 0.381 0.635 18.542 18.923 8.128 9.271 3.556 3.886 5.334 6.604 11.888 12.827
U
12345
A L
F
K
G D 5 PL 0.014 (0.356) M T P
M
J 5 PL S
DIM A B C D E F G J K L Q S U
TV SUFFIX PLASTIC PACKAGE CASE 314B-05 ISSUE J
Q
B -P-
C
OPTIONAL CHAMFER
E
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION D DOES NOT INCLUDE INTERCONNECT BAR (DAMBAR) PROTRUSION. DIMENSION D INCLUDING PROTRUSION SHALL NOT EXCEED 0.043 (1.092) MAXIMUM. INCHES MIN MAX 0.572 0.613 0.390 0.415 0.170 0.180 0.025 0.038 0.048 0.055 0.850 0.935 0.067 BSC 0.166 BSC 0.015 0.025 0.900 1.100 0.320 0.365 0.320 BSC 0.140 0.153 0.620 - 0.468 0.505 0.735 - 0.090 0.110 MILLIMETERS MIN MAX 14.529 15.570 9.906 10.541 4.318 4.572 0.635 0.965 1.219 1.397 21.590 23.749 1.702 BSC 4.216 BSC 0.381 0.635 22.860 27.940 8.128 9.271 8.128 BSC 3.556 3.886 - 15.748 11.888 12.827 - 18.669 2.286 2.794
U K F
12345
A S L W V
DIM A B C D E F G H J K L N Q S U V W
G D 5 PL 0.10 (0.254)
M
0.24 (0.610)
J 5 PL MT N
H
TP
M
-T-
SEATING PLANE
MOTOROLA ANALOG IC DEVICE DATA
5
LM2935
OUTLINE DIMENSIONS
T SUFFIX PLASTIC PACKAGE CASE 314D-03 ISSUE D
-T- -Q- B U A L
12345
SEATING PLANE
C E
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION D DOES NOT INCLUDE INTERCONNECT BAR (DAMBAR) PROTRUSION. DIMENSION D INCLUDING PROTRUSION SHALL NOT EXCEED 10.92 (0.043) MAXIMUM. DIM A B C D E G H J K L Q U S INCHES MIN MAX 0.572 0.613 0.390 0.415 0.170 0.180 0.025 0.038 0.048 0.055 0.067 BSC 0.087 0.112 0.015 0.025 1.020 1.065 0.320 0.365 0.140 0.153 0.105 0.117 0.543 0.582 MILLIMETERS MIN MAX 14.529 15.570 9.906 10.541 4.572 4.318 0.965 0.635 1.397 1.219 1.702 BSC 2.845 2.210 0.635 0.381 25.908 27.051 9.271 8.128 3.886 3.556 2.972 2.667 13.792 14.783
K S
G D 5 PL 0.356 (0.014)
M
J H
M
TQ
D2T SUFFIX PLASTIC PACKAGE CASE 936A-02 (D2PAK) ISSUE A
OPTIONAL CHAMFER
-T-
TERMINAL 6
A
E S V H
U
K B
1 2 3 4 5
NOTES: 1 DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2 CONTROLLING DIMENSION: INCH. 3 TAB CONTOUR OPTIONAL WITHIN DIMENSIONS A AND K. 4 DIMENSIONS U AND V ESTABLISH A MINIMUM MOUNTING SURFACE FOR TERMINAL 6. 5 DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH OR GATE PROTRUSIONS. MOLD FLASH AND GATE PROTRUSIONS NOT TO EXCEED 0.025 (0.635) MAXIMUM. INCHES MIN MAX 0.386 0.403 0.356 0.368 0.170 0.180 0.026 0.036 0.045 0.055 0.067 BSC 0.539 0.579 0.050 REF 0.000 0.010 0.088 0.102 0.018 0.026 0.058 0.078 5 _ REF 0.116 REF 0.200 MIN 0.250 MIN MILLIMETERS MIN MAX 9.804 10.236 9.042 9.347 4.318 4.572 0.660 0.914 1.143 1.397 1.702 BSC 13.691 14.707 1.270 REF 0.000 0.254 2.235 2.591 0.457 0.660 1.473 1.981 5 _ REF 2.946 REF 5.080 MIN 6.350 MIN
M
L P
D 0.010 (0.254) M T G
N R
C
DIM A B C D E G H K L M N P R S U V
6
MOTOROLA ANALOG IC DEVICE DATA
LM2935
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MOTOROLA ANALOG IC DEVICE DATA
7
LM2935
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8
LM2935/D MOTOROLA ANALOG IC DEVICE DATA
*LM2935/D*

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