TEXAS INSTRUMENTS SLTS163 Technical data

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PT7615—5V

20-A Low-Voltage Programmable
Integrated Switching Regulator

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-input 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.

Features

• Single-Device: +5V Input

• 20A Output

• 5-bit Programmable:

1.075V to 1.85V (25mV Steps)

• VRM 9.0 Compatible

• High Efficiency (87%)

Ordering Information

PT7615o = 1.075 to 1.85Volts
PT7743o = 20A Booster

PT Series Suffix

Case/Pin Order Package
Configuration Suffix Code

Vertical N (EHD)
Horizontal A (EHA)
SMD C (EHC)

(Reference the applicable package code draw­ing for the dimensions and PC board layout)

(PT1234x )

(Revised 12/13/2001)

• Differential Remote Sense

• Short-Circuit Protection

• Compatible with PT7743

20A “Current Booster”

Pin-Out Information

Pin Function

1 VID0
2 VID1
3 VID2
4 VID3
5 STBY *
6 VID4
7V

in

8V

in

9V

in

10 V

in

11 V

in
12 Remote Sense (–)
13 GND
14 GND

For STBY* pin: open =output enabled

ground =output disabled.

Pin Function

15 GND
16 GND
17 GND
18 GND
19 GND
20 V
21 V
22 V
23 V
24 V
25 V
26 Remote Sense (+)
27 Sync Out

SLTS163

out
out
out
out
out
out

Standard Application

For technical support and more information, see inside back cover or visit www.ti.com

VID0
VID1
VID2
VID3
VID4

V

IN

SYNC OUT

GND

STBY*

PROGRAMMING PINS

L1

H

1

7-11

+

C

IN

4321 26

6

PT7615

27

REMOTE SENSE(+)

20-25

125 13-19

REMOTE SENSE(–)

V

OUT

+

C

OUT

GND

Cin= Required 1500µF electrolytic
C

= Required 330µF electrolytic

out

L1= Optional 1µH input choke

L
O
A
D

PT7615—5V

20-A Low-Voltage Programmable
Integrated Switching Regulator

Programming Information

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.

VID4=1 VID4=0

Specifications (Unless otherwise stated, T

=25°C, Vin =5V, Cin =1,500µF, C

a

20-A Programmable SIP Family

Product Voltage 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 — —

out

Input Adjust Output

=330µF, and Io =Iomax)

PT7615

Characteristics Symbols Conditions Min Typ Max Units

Output Current Io Ta = +60°C, 200 LFM, pkg N 0.1

Ta = +25°C, natural convection 0.1

(1)

—20A

(1)

—20

Input Voltage Range Vin Over Io range 4.5 — 5.5 V

Set-Point Voltage Tolerance Vo tol — ±10 ±25

Temperature Variation Reg

temp

–40°C ≤Ta ≤ +85°C — ±1.5 — %V

(2)

mV

Line Regulation Regline Over Vin range — ±5 ±10 mV

Load Regulation Regload Over Io range — ±5 ±10 mV
Total Output Voltage Variation ∆V

Efficiency η I

tol Set-point, line, load

o

–40°C ≤Ta ≤ +85°C

o = 10A Vo = 1.8V — 87 —

I

o = 20A Vo = 1.8V — 82 —

—±2±3%V

o = 1.5V — 84 — %

V

Vo = 1.2V — 81 —

o = 1.5V — 79 — %

V

Vo = 1.2V — 75 —

Vo Ripple (pk-pk) Vr 20MHz bandwidth — 40 — mV

Transient Response ttr 1A/µs load step, 10A and 20A — 50 — µSec

Vos Vo over/undershoot — ±100 — mV

Short Circuit Threshold Isc (pk) — 32 — A

Switching Frequency ƒs Over Vin range 300 350 400 kHz

STBY* Input Requirements Referenced to GND

Input High Voltage V
Input Low Voltage V

Input Low Current I

IH
IL

IL

Pin 5 to GND — 0.3 — mA

2.0 —

-0.2 — 0.8

Open

(3)

V

Standby Input Current Iin standby Pin 5 to GND — 30 — mA

External Capacitance C

out

Operating Temperature Range Ta Over Vin Range –40 — +85

330

(4)

— 15,000 µF

(5)

°C

Storage Temperature Ts — -40 — +125 °C

Mechanical Shock Per Mil-STD-883D, Method 2002.3

Mechanical Vibration Per Mil-STD-883D, Method 2007.2, — 10 — G’s

1 msec, Half Sine, mounted to a fixture — 500 — 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 applied. 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:

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 further
information refer to the application note regarding capacitor selection for this product.

Input Filter:

The PT7615 require a minimum output capacitance of 330µF for proper operation. The PT7615 also requires an input capacitance of 1500µF,

An input filter inductor is optional for most applications. The inductor must be sized to handle 10ADC with a typical value of 1µH.

o

o

pp

For technical support and more information, see inside back cover or visit www.ti.com

PT7615—5V

)

)

)

)

)

20 Amp Low Voltage Programmable
Integrated Switching Regulator

T ypical Characteristics

PT7615 Characteristic Data, Vin =5.0 (See Note A)

Efficiency vs Output Current

90.0

80.0

70.0

Efficiency - %

60.0

50.0
048121620

Ripple vs Output Current

50

40

30

20

Ripple - mV

10

0

048121620

Iout (A

Iout (A

V

OUT

1.8

1.5

1.2

V

OUT

1.8

1.5

1.2

PT7615 Safe Operating Area, Vin =5.0 (See Note B)

PT7615; Vo =1.2V

90

80

70

60

50

40

Ambient Temperature (°C)

30

20

0 4 8 12 16 20

PT7615; Vo =1.8V

90

80

70

60

50

40

Ambient Temperature (°C)

30

20

0 4 8 12 16 20

Iout (A

Iout (A

Airflow

200LFM
120LFM
60LFM
Nat conv

Airflow

200LFM
120LFM
60LFM
Nat conv

Power Dissipation vs Output Current

8

6

4

Pd - Watts

2

0

048121620

Note A:

All characteristic data in the above graphs has been developed from actual products tested at 25°C. This data is considered typical for the ISR.

Note B:

SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.

Iout (A

V

OUT

1.8

1.5

1.2

For technical support and more information, see inside back cover or visit www.ti.com