View SLTS102_1003225.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

PT6725 Series
13 Amp 12V Input Adjustable Integrated Switching Regulator
SLTS102
(Revised 6/30/2000)
e g Packag ce-Savin New Spa
The PT6725 is a new series of high-performance, 13 Amp Integrated Switching Regulators (ISRs) housed in a unique, space-saving 17-pin SIP package. The PT6725 series operates from a standard 12V power bus to provide a high performance lowvoltage power source for the industy's latest high-speed, low-voltage Ps and bus drivers.
Patent pending on package assembly
The PT6725 series has a trimmed output voltage which may be adjusted with an external resistor. The output current is rated to 14A for output voltages of 2.5V and lower. Other features includes a differential remote sense which allows the regulator to compensate for voltage drop between the ISR and load. This product also has short circuit protection.
Standard Application
STBY* Vout Adjust
REMOTE SENSE (+)
2 1 17
Pin-Out Information
Pin Function
1 2 3 4 5 6
COUT
REMOTE SENSE (-)
Pin Function
10 11 12 13 14
(4)
Vout adjust STBY* Do not connect Vin Vin Vin
Remote Sense Gnd
GND GND GND Vout Vout Vout Vout
Remote Sense Vout
VIN
L1
4-6
1H +
PT6725
8 - 12 7
13 - 16
VOUT
CIN
+
LOAD
7 8 9
15 16 17
GND GND
GND
Cin = Required 1000F electrolytic Cout= Required 330F electrolytic L1 = Optional 1H input choke
GND
For STBY* pin open = output enabled ground = output disabled.
Specifications
Characteristics (Ta = 25C unless noted) Output Current Input Voltage Range Output Voltage T olerance Short-Circuit Threshold Line Regulation Load Regulation Vo Ripple/Noise Transient Response with Cout = 330F Efficiency
PT6725 SERIES
Symbols Io(max) Vin Vo Isc Regline Regload Vn ttr Vos Conditions Ta = +60C, 200 LFM, pkg N Ta = +25C, natural convection 0.1A I o 13.0A Vin = 12V, Io = 13.0A -40C Ta +85C Vin = 12V 10.8V Vin 13.2V, Io = 13.0A Vin = 12V, 0.1 Io 13.0A Vin = 12V, Io = 13.0A Io step between 6.5A and 13A Vo over/undershoot Vin = 12V, Io = 9A Vo Vo Vo Vo Vo = 5.0V = 3.3V = 2.5V = 1.8V = 1.5V Vo 2.5V Vo >2.5V Min 0.1 (1) 0.1 (1) 10.8 Vo-0.03 -- -- -- -- -- -- -- -- -- -- -- 300 -40 -40 -- -- --
(2)
Typ -- -- -- -- 20 5 10 35 35 70 93 90 88 83 81 350 -- -- 500 15 26
Max 14.0 (3) 13.0 (3) 13.2 Vo+0.03 30 -- -- -- -- -- -- -- -- -- -- 400 +85
(3)
Units A V V A mV mV mV Sec mV
%
Switching Frequency Absolute Maximum Operating T emperature Range Storage T emperature Mechanical Shock Mechanical Vibration Weight
o Ta Ts
10.8V Vin 13.2V 0.1A I o 13.0A -- -- Per Mil-STD-883D, Method 2002.3 1 msec, Half Sine, mounted to a fixture Per Mil-STD-883D, Method 2007.2, 20-2000 Hz, Soldered in a PC board
kHz C C G's G's grams
+125 -- -- --
-- (1) (2) (3) (4)
--
Notes:
The ISR will operate down to no load with reduced specifications. For operation below 0C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon(R) capacitors. See Safe Operating Curves or contact the factory for the appropriate derating. If the Remote Sense Ground is not used, pin 7 must be connected to pin 8 for optimum output voltage accuracy.
External Capacitors: The PT6725 requires a minimum ouput capacitance of 330F with a maximum ESR of 50m @100kHz for proper operation. The maximum allowable output capacitance is 15,000F. The input capacitance must be rated for a minimum of 1.6Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required. For more information refer to the application note regarding capacitor selection for this product. Input Filter: An input filter inductor is optional for most applications. The inductor must be sized to handle 6.5ADC with a typical value of 1H.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT6725 Series
13 Amp 12V Input Adjustable Integrated Switching Regulator
Features
* * * * * * * * 14A Output Current +12V Input High Efficiency 17-pin Space Saving Package Solderable Copper Case Adjustable Output Voltage Differential Remote Sense Short Circuit Protection
Ordering Information
PT6724J = 5.0 Volts J PT6725J = 3.3 Volts J PT6726J = 2.5 Volts J PT6727J = 1.8 Volts J PT6728J = 1.5 Volts J
PT Series Suffix (PT1234X)
Case/Pin Configuration Vertical Through-Hole N Horizontal Through-Hole A Horizontal Surface Mount C
(For dimensions and PC board layout, see Package Styles 1340 and 1350.)
TYPICAL Typical Performance, Vin = 12.0V
Efficiency vs Output Current
100 95 90
CHARACTERISTICS Safe Operating Area, Vin = 12.0V
PT6724, Vo =5.0V
90.0 80.0
(See Foot Note A)
(See Foot Note B)
Ambient Temperature ( C)
Efficiency - %
Vout
85 80 75 70 65 60 0 2 4 6 8 10 12 14
70.0 60.0 50.0 40.0 30.0 20.0 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0
Airflow 200LFM 120LFM 60LFM Nat conv
5V 3.3V 2.5V 1.8V
Iout (A)
Iout (A)
Ripple vs Output Current
50 90.0 80.0 40
PT6725, Vo =3.3V
Ambient Temperature ( C)
Vout Ripple - mV
30
70.0 60.0 50.0 40.0 30.0
Airflow 200LFM 120LFM 60LFM Nat conv
20
5V 3.3V 2.5V 1.8V
10
0 0 2 4 6 8 10 12 14
20.0 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0
Iout (A)
Iout (A)
Power Dissipation vs Output Current
8 7 6 90.0 80.0
PT6726, Vo =2.5V
Ambient Temperature ( C)
70.0 60.0 50.0 40.0 30.0 20.0
Airflow 200LFM 120LFM 60LFM Nat conv
Pd - Watts
5 4 3 2 1 0 0 2 4 6 8 10 12 14
Vout 5V 1.8V
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
Iout (A)
Iout (A)
Note A: All data listed in the above graphs has been developed from actual products tested at 25C. This data is considered typical data for the ISR. Note B: SOA curves represent the conditions at which internal components are at or below manufacturer's maximum operating temperatures. For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6725 Series
Adjusting the Output Voltage of the PT6725 ExcaliburTM Converters
The PT6725 ISRs are a non-programmable version of the PT6721, 12V input ExcaliburTM family of converters. These regulators have a fixed output voltage, which may be adjusted higher or lower than the factory trimmed preset voltage using a single external resistor. Table 1 gives the allowable adjustment range for each model as Va (min) and Va (max). Adjust Up: An increase in the output voltage is obtained by adding a resistor R2, between pin 1 (Vo adjust) and pin 7 (-Remote Sense). Adjust Down: Add a resistor (R1), between pin 1 (Vo adjust) and pin 17 (+Remote Sense). Refer to Figure 1 and T able 2 for both the placement and value of the required resistor, either (R1) or R2 as appropriate. Notes: 1. Use only a single 1% resistor in either the (R1) or R2 location. Place the resistor as close to the ISR as possible. 2. Never connect capacitors from Vo adjust to either GND, Vout, or the Remote Sense pins. Any capacitance added to the Vo adjust pin will affect the stability of the ISR. 3. If the remote sense feature is not being used, pin 7 must be connected to pin 8 for optimum output voltage accuracy. Consequently the resistors (R1) and R2 may then be connected from Vo Adjust to either Vout or GND respectively.
Table 1 PT6725 SERIES ADJUSTMENT PARAMETERS
Series Pt # Vo (nom) Va (min) Va (max) Ro (k) Rs (k) PT6728 1.5 1.47 1.73 10.0 49.9 PT6727 1.8 1.75 2.0 10.0 49.9 PT6726 2.5 2.25 2.85 10.0 33.2 PT6725 3.3 2.75 3.75 10.0 24.9
Figure 1
2
Stby*
17
Sns(+)
+5V
4,5,6
V in
PT6725
GND Vo(adj) Sns(-)
V out
13 16
Vo
8 12 +
1
7
(R1) Adj Down
+
C in R2 Adjust Up
C out
L O A D
COM
COM
The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulas. Ro (Va - 1.27) (Vo - Va)
(R1)
=
- Rs
k
R2
=
1.27 Ro Va - Vo
- Rs
k
Where: Vo Va Ro Rs
= Original output voltage = Adjusted output voltage = The resistance value in T able 1 = Series resistance value from T able 1
PT6724 5.0 4.01 5.47 9.09 24.9
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes continued
PT6725 Series
Table 2 PT6725 SERIES ADJUSTMENT RESISTOR VALUES
Series Pt # Vo (nom) Va (req'd) 1.47 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 R1 = (Blue) R2 = Black 229.0k 102.0k 59.8k 38.6k 25.9k 17.4k 11.4k 6.9k 3.3k 221.0k 93.8k 51.5k 30.3k 17.6k 9.1k 3.1k (2.0)k (5.7)k (10.2)k (15.9)k (23.1)k (32.8)k (46.3)k (66.6)k (100.0)k (168.0)k (371.0)k (6.0)k (18.3)k (38.8)k (79.8)k (203.0)k 204.0k 77.1k 34.8k 13.6k 204.0k 77.1k 34.8k 13.6k (46.1)k PT6728 1.5 (16.8)k PT6727 1.8 PT6726 2.5 PT6725 3.3 Series Pt # Vo (nom) Va (req'd) 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 90.5k 32.8k 13.6k 4.0k PT6724 5.0 (3.7)k (8.4)k (14.4)k (22.5)k (33.8)k (50.8)k (79.0)k (136.0)k (305.0)k
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6721/6725 Series
Capacitor Recommendations for the PT6721 and PT6725 Series Regulators
Input Capacitors The recommended input capacitance is determined by 1.6 ampere minimum ripple current rating and 1000F minimum capacitance. T antalum capacitors listed below cannot be used on the input bus since they are not rated for 12V operation. Ripple current and Equivalent Series Resistance (ESR) values are the major considerations along with temperature when selecting the proper capacitor. Output Capacitors The minimum required output capacitance is 330F with a maximum ESR less than or equal to 50m. Failure to observe this requirement may lead to regulator instability or oscillation. Electrolytic capacitors have poor ripple performance at frequencies greater than 400kHz, but excellent low frequency transient response. Above the ripple frequency ceramic decoupling capacitors are necessary to improve the transient response and reduce any microprocessor high frequency noise components apparent during higher current excursions. Preferred low ESR type capacitor part numbers are identified in the T able 1 below. Tantalum Characteristics
Table 1 Capacitors Characteristic Data
T antalum capacitors are recommended on the output bus but only TPS Series, Sprague 593D/594/595 Series, or Kemet T495/T510 Series. The AVX TPS Series, Sprague Series or Kemet Series tantalum capacitors are recommended over other manufacturer's due to their higher surge current, excellent power dissipation and ripple current ratings. As an example, the TAJ Series by AVX is not recommended. This series exhibits considerably higher ESR, reduced power dissipation and lower ripple current capability. The TAJ Series is a less reliable compared to the TPS series when comparing power dissipation capability. Capacitor Table T able 1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple current (rms) ratings. The suggested minimum quantities per regulator for both the input and output buses are identified. This is not an extensive capacitor list. The table below is a selection guide for input and output capacitors. Other capacitor vendors are available with comparable RMS ripple current rating and ESR (Equivalent Series Resistance at 100kHz). These critical parameters are necessary to insure both optimum regulator performance and long capacitor life.
Capac i t or Vendor/ Ser i es
Working Voltage Panasonic FC Series FA Series United Chemi -con LFVSeries Nichicon PL Series PM Series Panasonic FC Series Surface Mtg OsconSS/SV Series AVX Tantalum TPS Series Kemet Tantalum T510/T495 Series Sprague Tantalum 594D Series
35V 25V 25V
Capac i t or Char ac t e r i s t i c s
Qu a n t i t y
Value(F)
( ESR) Equi v al e nt Se r i e s Re s i s t anc e
0.043 0.038 0.038
1 0 5 C Ma x i m u m Ri ppl e C u r r e n t ( I r ms )
1655mA 1655mA 1690mA
Phy s i c al S i z e ( mm)
12.5x20 12.5x20 16x15
I nput Bu s
2 1 1
Ou t p u t Bu s
1 2 1
Ve n d o r N u m b e r
680 1000 1000
EEUFC1V681 EEUFC1E102 EEUFC1E102S
35V 35V 16V 35V 25V 35V 35V 25V 35V 10V 10V 10V 10V 10V 10V 10V
680 1000 470 680 1200 1000 1000 1000 470 330 330 330 330 330 220 330
0.034 0.038 0.084/2=042 0.036 0.039 0.034 0038 0.038 0.0430 0.025 0.020 0.100/2=0.050 0.060/2=0.030 0.033 0.070/2=0.035 0.045
1690mA 1630mA 825mA x2 1660mA 1600mA 1770mA 2000mA 2000mA 1690mA 3500mA 3800mA >2500mA >3000mA 1400mA >2000mA 2360mA
12.5x25 16x20 10x16 12.5x25 18x15 16x20 18x16.5 18x16.5 16x16.5 10x10.5 10.3x10.3 7.3L x 5.7W x 4.1H 4.3Wx7.3L x4.0H
2 1 N/R(1) 2 1 1 1 1 2 N/R(1) N/R(1) N/R(1) N/R(1) N/R(1) N/R(1) N/R(1)
1 1 2 1 1 1 1 1 1 1 1 2 2 1 2 1
LXV35VB680M12X25LL LXV35VB102M16X20LL LXV16VB471M10X16LL UPL1V681MHH UPL1E122MHH6 UPM1V102MHH6 EEVFC1V102N EEVFC1E102N EEVFC1V471N 10SS330M( If Output <5V) 10SV330( If Output <5V) Surface Mount(SV) TPSE337M010R0100 TPSV337M010R0060 Surface Mount 510X337M010AS T495X227M0100AS Surface Mount 594D337X0010R2T Surface Mount
7.2L x 6W x 4.1H
Note: (N/R) 10V tantalums are not recommend for the input bus.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Package S tyle 1340
S uffix N
(Re vise d 6/30/2000)
PACKAGE INFORMATION AND DIMENSIONS
Powe r Tre nds proprie tary package de sign. All rights re se rve d. Pate nt pe nding.
For te chnical support and more information, se e inside back cove r or visit www.ti.com/powe rtre nds
Package S tyle 1350
S uffix A, C
(Re vise d 6/30/2000)
PACKAGE INFORMATION AND DIMENSIONS
Powe r Tre nds proprie tary package de sign. All rights re se rve d. Pate nt pe nding.
For te chnical support and more information, se e inside back cove r or visit www.ti.com/powe rtre nds
IMPORTANT NOTICE Te xas Instrume nts and its subsidiarie s (TI) re se rve the right to make change s to the ir products or to discontinue any product or se rvice without notice , and advise custome rs to obtain the late st ve rsion of re le vant information to ve rify, be fore placing orde rs, that information be ing re lie d on is curre nt and comple te . All products are sold subje ct to the te rms and conditions of sale supplie d at the time of orde r acknowle dgme nt, including those pe rtaining to warranty, pate nt infringe me nt, and limitation of liability. TI warrants pe rformance of its se miconductor products to the spe cifications applicable at the time of sale in accordance with TI's standard warranty. Te sting and othe r quality control te chnique s are utilize d to the e xte nt TI de e ms ne ce ssary to support this warranty. Spe cific te sting of all parame te rs of e ach de vice is not ne ce ssarily pe rforme d, e xce pt those mandate d by gove rnme nt re quire me nts. Custome rs are re sponsible for the ir applications using TI compone nts. In orde r to minimize risks associate d with the custome r's applications, ade quate de sign and ope rating safe guards must be provide d by the custome r to minimize inhe re nt or proce dural hazards. TI assume s no liability for applications assistance or custome r product de sign. TI doe s not warrant or re pre se nt that any lice nse , e ithe r e xpre ss or implie d, is grante d unde r any pate nt right, copyright, mask work right, or othe r inte lle ctual prope rty right of TI cove ring or re lating to any combination, machine , or proce ss in which such se miconductor products or se rvice s might be or are use d. TI's publication of information re garding any third party's products or se rvice s doe s not constitute TI's approval, warranty or e ndorse me nt the re of.
Copyright (c) 2000, Te xas Instrume nts Incorporate d

▲Up To Search▲

Price & Availability of SLTS102

	To Download SLTS102 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .