PT7772N [TI]
Sledge Hammer;
| 型号： | PT7772N |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Sledge Hammer 开关 |
| 文件： | 总3页 (文件大小：182K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
For assistance or to order, call (800) 531-5782
S e r i e s
P T 7 7 7 2
32 AMP HIGH-PERFORMANCE
“SLEDGE HAMMER” PROGRAMMABLE ISR
Revised 7/15/98
The PT7772 is a new series of
can be easily programmed from 1.3V
high-performance, 32 Amp Integrated
Switching Regulators (ISRs) housed in
a 27-pin SIP package. The 32A capa-
bility allows easy
integration of the latest high-speed,
low-voltage µPs, ASICs, DSPs, and
bus drivers into existing 3.3V systems.
The output voltage of the PT7772
to 2.05V with a 4-bit input compatible
with Intel’s Pentium Pro Processor. A
differential remote sense is also pro-
vided which automatically compensates
for any voltage drop from the ISR
to the load.
2400µF of output capacitance
are required for proper operation.
Pin-Out Information
Pin Function
Pin Function
14 GND
15 GND
16 GND
17 GND
Standard Application
PROGRAMMING PINS
1
2
3
4
5
6
7
8
VID0
VID1
VID0
VID1
VID2
VID3
VID2
REMOTE SENSE (+)
VID3
4
3
2
1
26
STBY*- Stand-by
18 GND
19 GND
L1
Do not connect
VIN
VOUT
7 - 11
20 - 25
PT7772
Vin
Vin
1µH
20
21
22
23
24
25
V
V
V
V
V
V
out
out
out
out
out
out
27
13 - 19
5
12
+
+
9
Vin
CIN
COUT
LOAD
10 Vin
11 Vin
12 Remote Sense Gnd
13 GND
SYNC OUT
GND
GND
STBY*
26 Remote Sense V
27 Sync Out
REMOTE SENSE (-)
out
C
C
= Required 2400µF electrolytic
= Required 2400µF electrolytic
in
out
For STBY* pin; open = output enabled;
ground = output disabled.
L1 = Optional 1µH input choke
Specifications
PT7772 SERIES
Characteristics
(T a = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
(1)
Output Current
Io
Ta = +60°C, 200 LFM, pkg N
Ta = +25°C, natural convection
0.1
0.1
—
—
32
26
A
A
(1)
(2)
Input Voltage Range
Vin
0.1A ≤ Io ≤ 32A
3.1
—
3.6
V
Output Voltage Tolerance
∆Vo
Vin = +3.3V, Io = 32A
0°C ≤ Ta ≤ +55°C
Vo-0.03
—
Vo+0.03
V
Line Regulation
Regline
Regload
Vn
3.1V ≤ Vin ≤ 3.6V, Io = 32A
Vin = +3.3V, 0.1 ≤ Io ≤ 32A
Vin = +3.3V, Io = 32A
—
—
—
±10
±10
50
—
—
—
mV
mV
mV
Load Regulation
Vo Ripple/Noise pk-pk
Transient Response
with Cout = 2400µF
ttr
Vos
Io step between 16A and 32A
Vo over/undershoot
—
—
100
200
—
—
µSec
mV
Efficiency
η
Vin = +3.3V, Io = 20A, Vo = 1.8V
—
90
—
%
Switching Frequency
ƒo
3.1V ≤ Vin ≤ 3.6V
0.1A ≤ Io ≤ 32A
650
700
750
kHz
Absolute Maximum
Ta
—
0
0
—
—
+85
+65
°C
°C
Operating Temperature Range
Recommended Operating
Temperature Range
Ta
Forced Air Flow = 200 LFM
Over Vin and Io Ranges
Storage Temperature
Weight
Ts
—
—
-40
—
—
+125
—
°C
Vertical/Horizontal
53/66
grams
(1) ISR-will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected.
(2) The minimum input voltage is 3.1V or Vout+1.2V, whichever is greater.
Output Capacitors: The PT7772 series requires a minimum output capacitance of 2400µF for proper operation. Do not use Oscon type capacitors.
The maximum allowable output capacitance is 30,000µF.
Input Filter: An input filter is optional for most applications. The input inductor must be sized to handle 32ADC with a typical value of 1µH.
The input capacitance must be rated for a minimum of 2.6Arms of ripple current. For transient or dynamic load applications, additional
capacitance may be required.
14
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
For assistance or to order, call (800) 531-5782
S e r i e s
P T 7 7 7 2
Programming Information
Features
Ordering Information
VID3 VID2 VID1 VID0
Vout
1.30V
1.35V
1.40V
1.45V
1.50V
1.55V
1.60V
1.65V
1.70V
1.75V
1.80V
1.85V
1.90V
1.95V
2.00V
2.05V
• +3.3V input
PT7772❏ = 1.3 to 2.05 Volts
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
• 5-bit Programmable:
1.3V to 2.05V@32A
• High Efficiency
• Input Voltage Range:
3.1V to 3.6V
• Differential Remote
Sense
For dimensions and PC board layout, see
Package Style 1020 and 1030
PT Series Suffix
(PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
N
A
C
• 27-pin SIP Package
Horizontal Through-Hole
Horizontal Surface Mount
Logic 0 = Pin 12 potential (remote sense gnd)
Logic 1 = Open circuit (no pull-up resistors)
VID3 may not be changed while the unit is operating.
C H A R A C T E R I S T I C D A T A
Efficiency vs Output Current (@Vout=+1.8V)
Safe Operating Area (@Vin=+3.3V, Vout=+1.8V, Pkg N)
90
100
90
80
70
Vin
Airflow
Recommended Maximum
Operating Temperature
Nat. Conv
4.5V
60
60 LFM
5.0V
5.5V
120 LFM
80
200 LFM
50
40
30
20
70
60
0
4
8
12
16
20
24
28
32
0
4
8
12
16
20
24
28
32
Output Current (A)
Output Current (A)
Note: SOA curves represent operating conditions at
which internal components are at or below manufacturer’s
maximum rated operating temperatures.
Power Dissipation vs Output Current (@Vout=+1.8V)
20
18
16
14
12
10
8
Vin
4.5V
5.0V
5.5V
6
4
2
0
0
4
8
12
16
20
24
28
32
Output Current (A)
Output Ripple vs Output Current (@Vout=+1.8V)
40
35
30
25
20
15
10
5
Vin
4.5V
5.0V
5.5V
0
0
4
8
12
16
20
24
28
32
Output Current (A)
15
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
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