PT7775鈥?V
32 Amp 0.8V to 3.1V Programmable
Integrated Switching Regulator
SLTS114
(Revised 8/31/2000)
Description
The PT7775 is a high-output, 32A
Integrated Switching Regulator (ISR),
housed in a 27-pin SIP package. The
PT7775 is a low voltage version of
the PT7779, a next generation
鈥淪ledge Hammer鈥?ISR. These regu-
lators include short circuit protection
and require only 330碌F of output
capacitance.
The low-output voltage and 32A
load capability makes the PT7775 an
ideal source for powering the industry鈥檚
latest high-speed, low-voltage 碌Ps,
ASICs, and DSPs from an existing
5V source. The output voltage is
programmable from 0.8V to 3.1V, via
a 5-bit input.
The PT7775 will operate with
up to two PT7741 32A current
boosters. A differential remote sense
provides compensation for voltage
drop between the ISR and load.
Pin-Out Information
Standard Application
PROGRAMMING PINS
VID0
VID1
VID2
VID3
VID4
L1
1uH
+
STBY
REMOTE SENSE (+)
6
4
3
2
1
26
SNS(+)
VID4 - VID0
V
IN
7-11
Vin
PT7775
Synch
Out
GND
SNS(-)
Vo
20-25
V
OUT
SYNC OUT
GND
STBY*
C
IN
5
27
13-19
12
+
C
OUT
GND
REMOTE SENSE (鈥?
LOAD
Pin Function
1
VID0
2
VID1
3
VID2
4
VID3
5
STBY*- Stand-by
6
VID4
7
V
in
8
V
in
9
V
in
10
V
in
11
V
in
12
Remote Sense Gnd
(3)
13
GND
Pin Function
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 V
out
27
Sync Out
Specifications
Characteristics
(T
a
= 25擄C unless noted)
Output Current
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
V
o
Ripple/Noise pk-pk
Transient Response
with C
out
= 330碌F
Efficiency
Switching Frequency
Absolute Maximum
Operating Temperature Range
Storage Temperature
Mechanical Vibration
Weight
鈥?/div>
Symbols
I
o
V
in
鈭哣
o
Reg
line
Reg
load
V
n
t
tr
V
os
畏
茠
o
T
a
T
s
C in = Required 2400碌F electrolytic
Cout = Required 330碌F electrolytic
L1 = Optional 1碌H input choke
For STBY* pin; open = output enabled;
ground = output disabled.
PT7775
Conditions
T
a
=
+60擄C, 200 LFM, pkg N
T
a
=
+25擄C, natural convection
0.1A
鈮?/div>
I
o
鈮?/div>
32A
V
in
= +5V, I
o
= 32A
鈥?0擄C
鈮?/div>
T
a
鈮?/div>
+85擄C
4.5V
鈮?/div>
V
in
鈮?/div>
5.5V, I
o
= 32A
V
in
= +5V, 0.1
鈮?/div>
I
o
鈮?/div>
32A
V
in
= +5V, I
o
= 32A
I
o
step between 16A and 32A
V
o
over/undershoot
V
in
= +5V, I
o
= 20A, V
o
= 3.3V
4.5V
鈮?/div>
V
in
鈮?/div>
5.5V
0.1A
鈮?/div>
I
o
鈮?/div>
32A
Over V
in
Range
鈥?/div>
Per Mil-STD-883D, Method 2007.2,
20-20,000Hz, Soldered in a PC board
Vertical/Horizontal
Min
0.1
0.1
4.5
V
o
-0.03
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
300
鈥?0
-40
鈥?/div>
鈥?/div>
(1)
(1)
Typ
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鹵10
鹵10
50
100
200
90
350
鈥?/div>
鈥?/div>
10/15
53/66
Max
32
31
5.5
V
o
+0.03
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
400
+85
(2)
Units
A
V
V
mV
mV
mV
碌Sec
mV
%
kHz
擄C
擄C
G鈥檚
grams
+125
鈥?/div>
鈥?/div>
Notes:
(1) ISR-will operate down to no load with reduced specifications.
(2) See SOA curves or consult the factory for the appropriate derating.
(3) If the remote sense ground is not used, pin 12 must be connected to pin13 for optimum output voltage accuracy.
External Capacitors:
The PT7775 requires a minimum output capacitance of 330碌F (ESR
鈮?/div>
0.1
鈩?
for proper operation. The PT7775 also requires an input capaci-
tance of 2400碌F, which must be rated for a minimum of 2.0Arms ripple current. For transient or dynamic load applications, additional capacitance may be required. For
further information, see the accompanying capacitor application note for this product.
Input Filter:
An input filter choke is optional for most applications. The input inductor must be sized to handle 32ADC with a typical value of 1碌H.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
next
標準包裝 6
類別 電源 - 板載
家庭 DC DC Converters
系列 PT7770
類型 非隔離（POL）
輸出數 1
電壓 - 輸入（最小） 4.5V
電壓 - 輸入（最大） 5.5V
Voltage - Output 1 0.8 ~ 3.1 V
Voltage - Output 2 -
Voltage - Output 3 -
電流 - 輸出（最大） 32A
電源（瓦） - 制造商系列 99W
電壓 - 隔離 -
特點 -
安裝類型 通孔，直角
封裝/外殼 27-SIP 模塊
尺寸/尺寸 -
包裝 托盤
工作溫度 -40°C ~ 85°C
效率 90%
電源（瓦特）- 最大 99.2W
型號
版本
描述
廠商
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