PT7716 Datasheet, PDF (1/9 Pages) Texas Instruments – 20-A Low-Voltage Programmable Integrated Switching Regulator

PT7716—3.3V
20-A Low-Voltage Programmable
Integrated Switching Regulator
SLTS162B
(Revised 6/27/2002)
Features
• +3.3V Input Voltage
• 20-A Output Current
• 5-bit Programmable:
1.075V to 1.85V (25mV Steps)
• VRM 9.0 Compatible
• High Efficiency (88%)
• Differential Remote Sense
• Over-Current Protection
• 27-Pin Space-Saving Package
• Solderable Copper Case
• Compatible with PT7744
20A “Current Booster”
Description
The PT7716 Excalibur™ power module
is a 20-A integrated switching regulator
(ISR) housed a 27-pin space-saving copper
package. Operating from a 3.3V-input bus,
the PT7716 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 output voltage in steps
of 25mV and is VRM 9.0 compatible.
This regulator is ideally suited for
applications that employ microprocessor
and DSP products that require core supply
voltages as low as 1.075V.
The PT7716 includes a Shutdown
control, Differential Remote Sense, and
Short-Circuit Protection.
Ordering Information
PT7716o = 1.075 to 1.85Volts
PT7744o = 20-A Booster *
* Consult the related application note for
information on current booster operation.
PT Series Suffix (PT1234 x )
Case/Pin
Order
Configuration Suffix
Vertical
N
Horizontal A
SMD
C
Package
Code †
(ENE)
(ENF)
(ENG)
† Previously known as package styles
1420 & 1430
(Reference the applicable package code
drawing for the dimensions and PC
board layout)
Pin-Out Information
Pin Function
1 VID0
2 VID1
3 VID2
4 VID3
5 STBY *
6 VID4
7 Vin
8 Vin
9 Vin
10 Vin
11 Vin
12 Rem Sense Gnd
13 GND
14 GND
Pin Function
15 GND
16 GND
17 GND
18 GND
19 GND
20 Vout
21 Vout
22 Vout
23 Vout
24 Vout
25 Vout
26 Rem Sense V_out
27 Sync Out
* For STBY pin: open =output enabled
ground =output disabled.
Standard Application
VID0
VID1
VID2
VID3
VID4
V _IN
PROGRAMMING PINS
REMOTE SENSE(+)
64321
26
L1
7-11
PT7716
20-25
1µH
V_OUT
SYNC OUT
GND
+
C _IN
27 5 13-19 12
+
C_OUT
L
O
A
D
GND
STBY*
REMOTE SENSE(–)
Cin = Required 1500µF electrolytic
Cout = Required 330µF electrolytic
Lin = Optional 1µH input choke
For technical support and more information, see inside back cover or visit www.ti.com