PT7615 TI | Alldatasheet

Document overview

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Technical content

Features

  • Single-Device: +5V Input
  • 20A Output
  • 5-bit Programmable: 1.075V to 1.85V (25mV Steps)
  • VRM 9.0 Compatible
  • High Efficiency (87%)

Description

The PT7615 power module is a 20-A fully integrated switching regulator (ISR) housed in a 27-pin aluminum SIP package. Operating from a 5V-i nput bus, the PT7615 produces a tightly regulated supply voltage that is programmable over the range, 1.075V to 1.85V . The output voltage is selected via a 5-bit code. The code adjusts the voltage in steps of 25mV and is VRM 9.0 compatible. This regulator is most suitable for applications that employ microprocessor and DSP products that require core supply voltages as low as 1.075V. The PT7615 includes a Shutdown control, Differential Remote Sense, and Short-Circuit Protection.

  • Differential Remote Sense
  • Short-Circuit Protection
  • Compatible with PT7743 20A “Current Booster”Standard Application Cin = Required 1500µF electrolytic Cout = Required 330µF electrolytic L1 = Optional 1µH input choke PT7615 4321 2 6 20-25 125 13-1927 7-11 L O A D C OUT +C IN PROGRAMMING PINS V IN V OUT SYNC OUT GND REMOTE SENSE(+) REMOTE SENSE(–)STBY* VID0 VID1 VID2 VID3 1 µ H GND VID4 6 For STBY* pin: open =output enabled ground =output disabled. Pin-Out Information Pin Function

1 VID0

2 VID1

3 VID2

4 VID3

5 STBY *

6 VID4

10 V in

11 V in

12 Remote Sense (–)

13 GND

14 GND

15 GND

16 GND

17 GND

18 GND

19 GND

20 V out

21 V out

22 V out

23 V out

24 V out

25 V out

26 Remote Sense (+)

27 Sync Out

Ordering Information

PT7615/G6F = 1.075 to 1.85V olts PT7743/G6F = 20A Booster PT Series Suffix (PT1234x) Case/Pin Order Package Configuration Suffix Code Vertical N (EHD) Horizontal A (EHA) SMD C (EHC) (Reference the applicable package code draw- ing for the dimensions and PC board layout)

For technical support and more information, see inside back cover or visit www.ti.com 20-A Programmable SIP Family Input Adjust Output Product V oltage Description Method Range PT7709 5V VID 5-Bit 1.3V– 3.5V PT7708 3.3V VID 4-Bit 1.3V– 2.05V PT7615 5V VID 5-Bit 1.075V–1.85V PT7742 3.3V Booster — — PT7743 5V Booster — — PT7615— 5V 20-A Low-Voltage Programmable Integrated Switching Regulator Programming Information VID4=1 VID4=0 VID3 VID2 VID1 VID0 Vout Vout 1111 1 . 075V 1.475V 1110 1 . 100V 1.500V 1101 1 . 125V 1.525V 1100 1 . 150V 1.550V 1011 1 . 175V 1.575V 1010 1 . 200V 1.600V 1001 1 . 225V 1.625V 1000 1 . 250V 1.650V 0111 1 . 275V 1.675V 0110 1 . 300V 1.700V 0101 1 . 325V 1.725V 0100 1 . 350V 1.750V 0011 1 . 375V 1.775V 0010 1 . 400V 1.800V 0001 1 . 425V 1.825V 0000 1 . 450V 1.850V Logic 0 = Pin 12 potential (Rem Sense Gnd) Logic 1 = Open circuit (no pull-up resistors) VID4 may not be changed while the unit is operating. Specifications (Unless otherwise stated, T a =25°C, Vin =5V, Cin =1,500µF, Cout =330µF, and Io =Iomax) PT7615 Characteristics Symbols Conditions Min Typ Max Units Output Current I o Ta = +60°C, 200 LFM, pkg N 0.1 (1) —2 0A Ta = +25°C, natural convection 0.1 (1) —2 0 Input Voltage Range V in Over Io range 4.5 — 5.5 V Set-Point Voltage T olerance V o tol — ±10 ±25 (2) mV T emperature Variation Reg temp –40°C ≤Ta ≤ +85°C — ±1.5 — %V o Line Regulation Reg line Over Vin range — ±5 ±10 mV Load Regulation Reg load Over Io range — ±5 ±10 mV T otal Output Voltage Variation ∆Vo tol Set-point, line, load —± 2± 3% V o–40°C ≤Ta ≤ +85°C Efficiency η Io = 10A V o = 1.8V — 87 — Vo = 1.5V — 84 — % Vo = 1.2V — 81 — Io = 20A V o = 1.8V — 82 — Vo = 1.5V — 79 — % Vo = 1.2V — 75 — Vo Ripple (pk-pk) V r 20MHz bandwidth — 40 — mV pp T ransient Response t tr 1A/µs load step, 10A and 20A — 50 — µSec Vos Vo over/undershoot — ±100 — mV Short Circuit Threshold I sc (pk) — 32 — A Switching Frequency ƒ s Over Vin range 300 350 400 kHz STBY* Input Requirements Referenced to GND Input High Voltage V IH 2.0 — Open (3) VInput Low Voltage V IL -0.2 — 0.8 Input Low Current I IL Pin 5 to GND — 0.3 — mA Standby Input Current I in standby Pin 5 to GND — 30 — mA External Capacitance C out 330 (4) — 15,000 µF Operating T emperature Range T a Over Vin Range –40 — +85 (5) °C Storage T emperature T s — -40 — +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 1 msec, Half Sine, mounted to a fixture — 500 — G’s Mechanical Vibration Per Mil-STD-883D, Method 2007.2, — 10 — G’s 20-2000 Hz, Soldered in a PC board Weight — Vertical/Horizontal — 36 — grams Flammability — Materials meet UL 94V-0 Notes: (1) ISR-will operate down to no load with reduced specifications. (2) If the remote sense is not used, pin 12 must be connected to pin 13 for optimum output voltage accuracy. (3) The STBY* control (pin 5) has an internal pull-up. If it is left open-circuit, the module will operate when input power is a pplied. A low-leakage (<1µA) MOSFET must be used to control this pin. The open-circuit voltage may be as high as Vin. (4) For operation below 0°C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors. (5) See safe Operating Area curves or consult factory for the appropriate derating. External Capacitors: The PT7615 require a minimum output capacitance of 330µF for proper operation. The PT7615 also requires an input capacitance of 1500µF, which must be rated for a minimum of 1.4Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required. For f urther 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 10ADC with a typical value of 1µH.

For technical support and more information, see inside back cover or visit www.ti.com PT7615 Characteristic Data, V in =5.0 (See Note A) Efficiency vs Output Current Ripple vs Output Current Power Dissipation vs Output Current PT7615— 5V

20 Amp Low Voltage Programmable

Integrated Switching Regulator Note A: All characteristic data in the above graphs has been developed from actual products tested at 25°C. This data is considered ty pical for the ISR. Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures. Typical Characteristics 50.0 60.0 70.0 80.0 90.0 048 1 2 1 6 2 0 Iout (A ) Efficiency - % 1.8 1.5 1.2 VOUT 048 1 2 1 6 2 0 Iout (A ) Pd - Watts 1.8 1.5 1.2 VOUT 048 1 2 1 6 2 0 Iout (A ) Ripple - mV 1.8 1.5 1.2 VOUT PT7615; Vo =1.2V PT7615 Safe Operating Area, V in =5.0 (See Note B) 0 4 8 12 16 20 Iout (A ) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow 0 4 8 12 16 20 Iout (A ) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow PT7615; Vo =1.8V

For technical support and more information, see inside back cover or visit www.ti.com PT7708/09, PT7615, PT7742/PT7743 Capacitor Recommendations for 20-A Programmable Switching Regulators Input Capacitors The recommended input capacitance is determined by the 1.4 ampere minimum ripple current rating and 1500µF minimum capacitance. Capacitors listed below must be rated for a minimum of two times (2 ×) the input voltage with +5V operation. Ripple current and ≤100mΩ ESR (equivalent series resistance) values are the major consider- ations along with temperature when selecting the proper capacitor. Output Capacitors The minimum required output capacitance is 330µF with a maximum ESR less than or equal to 100m Ω . 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 nec- essary 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 Table 1 below. Note: (N/R) is not recommended for this application, due to extremely low Equivalent Series Resistance (ESR) Table 1 Capacitors Characteristic Data Tantalum Characteristics Tantalum capacitors with a minimum 10-V rating are recommended on the output bus, but only the AVX TPS Series, Sprague 594/595 Series, or Kemet T495/T510 Series. These AVX, Sprague, and Kemet capacitors are specified over other types due to their higher surge current, excellent power dissipation and ripple current ratings. As a caution, the TAJ Series by AVX is not recommended. This series exhibits considerably higher ESR, reduced power dissipation and lower ripple curr ent capability. The TAJ series is also less reliable compared to the TPS series when determining power dissipation capability. Capacitor Table Table 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. Capacitors from other vendors are available with comparible specifications. The RMS ripple current rating and ESR (Equivalent Series Resistance at 100kHz) are the critical parameters necessary to insure both optimum regulator performance and long capacitor life. roticapaC /rodneV seireS scitsiretcarahCroticapaCy titnauQ gnikroW egatloV )Fµ(eulaVt nelaviuqE)RSE( ecnatsiseRseireS mumixaMC°501 elppiR )smrI(tnerruC lacisyhP )mm(eziS tupnI suB tuptuO suB rebmuNrodneV cinosanaP )TMS(CF )laidaR(CF V61 V53 V01 V61 0022 033 065 0081 830.0 Ω 560.0 Ω 090.0 Ω 230.0 Ω Am0002 Am5021 Am557 Am0002 5.61x81 5.61x5.21 5.21x01 51x81 N222C1CFVEE QL133V1CFVEE 165A1CFUEE S281C1CFUEE detinU noC-imehC seireSVFL V52 V61 V61 033 0022 074 480.0 Ω 830.0 Ω 480.0 ÷Ω 240.0=2 Ω Am528 Am0361 2xAm528 61x01 02x61 61x01 LL61X01M133BV52VXL LL02X61M222BV61VXL LL61X01M174BV61VXL nocihciN seireSLP seireSMP V01 V01 V52 086 0081 033 090.0 Ω 440.0 Ω 590.0 Ω Am077 Am0241 Am057 51x01 51x61 51x01 6HHM186A1LPU 6HHM281A1LPU 6HPM133E1LPU nocsO )laidaR(SS )TMS(VS V01 V01 033 033 520.0 ÷Ω 600.0=4 Ω 20.0 ÷Ω 500.0=4 Ω Am0089> Am0089> 5.01x01 6.21x3.01 R/N )etoN( M033SS01 M033VS01 XVA mulatanaT seireS-SPT V01 V01 033 033 1.0 ÷Ω 20.0=5 Ω 60.0 Ω Am0053 Am6281 xL3.7 xW3.4 H1.4 0010R010M733VSPT 0600R010M733VSPT eugarpS mulatnaT D495/D595 V01 V01 033 086 540.0 ÷Ω 110.0=4 Ω 90.0 Ω Am0054> Am0661> xL3.7 xW7.5 H0.4 T2R0100X733D495 T2R0100X786D595 )tnuoMecafruS( temeK mulatnaT 594T/015T seireS V01 V01 033 022 530.0 Ω 70.0 ÷Ω 530.0=2 Ω Am0002 Am0002> L3.7xW3.4 H0.4x SA010M733X015 SA010M722X594T )tnuoMecafruS( pacsoPoynaS BPT V010 224 0.0 Ω Am0003x L2.7 xW3.4 H1.3 62M 022BPT01 )tnuoMecafruS(

For technical support and more information, see inside back cover or visit www.ti.com Pin-Coded Output Voltage Adjustment of 20-A Programmable Regulators The 20-A family of programmable ISRs incorporate a pin- coded control to adjust the output voltage. This feature uses the control pins VID0–VID4 (pins 1–6). When the control pins are left open-circuit, the ISR output regulates at its default output voltage. Each control pin is internally connected to a precision resistor, which when grounded applies a weighted change to the output voltage. By selectively grounding VID0–VID4, the output voltage of these ISRs can be programmed in incremental steps over the module’s output voltage range. The program codes and output voltage range offered by these ISRs are compatible with the Voltage ID specifications defined by Intel Corporation for VRMs (voltage regulator mod- ules). The codes are used by both the Pentium® and Athlon® microprocessors. Refer to Figure 1 for the connection schematic, and the respective device Data Sheet for the programming code information. Notes: 1. The programming convention is as follows: Logic 0: Connect to pin 12 (Remote Sense Ground). Logic 1: Open circuit/open drain (See notes 2, & 4) 2. Do not connect pull-up resistors to the voltage programming pins. 3. Use pin 12 (Remote Sense Ground) as the logic “0” reference. While the regular ground (pins 13-19) can also be used for programming, doing so will degrade the load reglation of the product. If the remote sense ground is not used, pin 12 must be connected to pin 13 for optimum output voltage accuracy. Figure 1 4. If active devices are used to ground the voltage control pins, low-level open drain MOSFET devices should be used over bipolar transistors. The inherent Vce(sat) in bipolar devices introduces errors in the device’s internal divider network. Discrete transistors such as the BSS138, 2N7002, or IRLML2402 are examples of appropriate devices. Active Voltage Programming: Special precautions should be taken when making changes to the voltage control progam code while the unit is powered. It is highly recommended that the ISR be either powered down or held in standby. Changes made to the program code while V out is enabled induces high current transients through the device. This is the result of the electrolytic output capacitors being either charged or discharged to the new output voltage set-point. The transient current can be minimized by making only in- cremental changes to the binary code, i.e. one LSB at a time. A minimum of 100µs settling time between each program state is also recommended. Making non- incremental changes to VID3 or VID4 while the output is enabled is discouraged. The transients induced can overstress the device. If the program code cannot be asserted priot to power-up, pull pin 5 (STBY) control to GND during the period that the input voltage is applied to V in. Releasing pin 5 will then allow the device to per- form a soft-start to the programmed voltage. For more information on the use of the Standby function, consult the related application note, “Using the Standby Function on 20-A Programmable Switching Regulators” C out C in 1µH (Optional) +5V COM STBY L O A D 64321 2 6 20-25 125 13-1927 7-11 VoVin GND SNS(+) SNS(-) Synch OutSTBY VID4 - VID0 PT770X/PT761X PT7708/09, PT7615

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