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参数资料
| 型号： | PT7769C |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 40 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, SMA31 |
| 封装： | SMD-31 |
| 文件页数： | 2/9页 |
| 文件大小： | 188K |
| 代理商： | PT7769C |
For technical support and more information, see inside back cover or visit www.ti.com
VID4=1 VID4=0
VID3 VID2 VID1 VID0
Vout
1
2.0V
1.30V
1
0
2.1V
1.35V
1
0
1
2.2V
1.40V
1
0
2.3V
1.45V
1
0
1
2.4V
1.50V
1
0
1
0
2.5V
1.55V
1
0
1
2.6V
1.60V
1
0
2.7V
1.65V
0
1
2.8V
1.70V
0
1
0
2.9V
1.75V
0
1
0
1
3.0V
1.80V
0
1
0
3.1V
1.85V
0
1
3.2V
1.90V
0
1
0
3.3V
1.95V
0
1
3.4V
2.00V
0
3.5V
2.05V
* For STBY* pin:
Open =Output Enabled
Ground =Output Disabled
Pin Function
1
VID0
2
VID1
3VID2
4
VID3
5
VID4
6
STBY *
7
Sync
8
No Connect
9Vin
10
Vin
Logic 0 = Pin 15 potential (Remote Sense GND)
Logic 1 = Open circuit (no pull-up resistors)
VID3 and VID4 may not be changed while the unit is operating.
PT7761—5V
40-A Programmable Integrated
Switching Regulator Module
Pin Function
11
Vin
12
Vin
13Vin
14
Vin
15
Rem Sense GND 2
16
GND
17
GND
18
GND
19
GND
20
GND
Pin Function
21
GND
22
GND
23Vout
24
Vout
25
Vout
26
Vout
27
Vout
28
Vout
29
Vout
30Vout
31
Rem Sense Vout
Pin-Out Information
Programming Information
Specifications (Unless otherwise stated, Ta =25°C, Cin =1,500F, Cout =330F, Vin =5V, Vo =3.3V, & Io =Iomax)
PT7761
Characteristics
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Ta =25°C, Natural convection
0.1 (1)
—40
A
Ta =60°C, 200LFM, Pkg N
0.1 (1)
—38
Input Voltage Range
Vin
Over Io range
4.5
—
5.5
V
Set-Point Voltage Tolerance
Votol
All output voltages
—
±25 (2)
mV
Temperature Variation
Regtemp
–40°C
≤ Ta ≤85°C, Io =Iomin
—
±0.75
—
%Vo
Line Regulation
Regline
Over Vin range
—
±5
—
mV
Load Regulation
Regload
Over load range
—
±5
—
mV
Total Output Variation
Votol
Includes set-point, line, load,
—
±1±3%Vo
–40°C
≤Ta ≤ +85°C
Efficiency
η
Io =20A
Vo = 3.3V
—
90
—
Vo = 2.5V
—
89
—
%
Vo = 1.8V
—
83—
Io =40A
Vo = 3.3V
—
86
—
Vo = 2.5V
—
85
—
%
Vo = 1.8V
—
80
—
Vo Ripple (pk-pk)
Vr
20MHz bandwidth
—
50
—
mV
Transient Response
ttr
1A/s load step from 50% to 100% Iomax
—
50
—
Sec
Vtr
Vo over/undershoot
—
100
—
mV
Short Circuit Threshold
Isc(pk)
Reset and auto-recovery
—
75
—
A
Switching Frequency
s
Over Vin and Io ranges
300
350
400
kHz
Standby Control (pin 6)
Input High Voltage
VIH
Referenced to GND (pins 16–22)
2
—
Open (3)
V
Input Low Voltage
VIL
-0.2
—
0.8
Input Low Current
IIL
Pin 6 to GND
—
0.4
—
mA
Quiescent Current
Iin stby
Pin 6 to GND
—
30
—
mA
External Output Capacitance
Cout
Between +Vo and GND
330
—
30,000
F
Operating Temperature Range
Ta
Over Vin Range
–40 (4)
—+85 (5)
°C
Storage Temperature
Ts
—
-40
—
+125
°C
Mechanical Shock
Mil-STD-883D, Method 2002.3
1 msec, Half Sine, mounted to a fixture
—
TBD
—
G’s
Mechanical Vibration
Vertical
—
TBD (6)
—
G’s
Mil-STD-883D, 20-2000 Hz
Horizontal
—
TBD (6)
—
Weight
—
Vertical/Horizontal
—
55
—
grams
Flammability
—
Materials meet UL 94V-0
Notes: (1) ISR-will operate down to no load with reduced specifications.
(2) If the Remote Sense Ground (Pin 15) is not used, it must be connected to pin 16 for optimum output voltage accuracy.
(3) The Standby control (pin 6) has an internal pull-up, and if left open-circuit the module will operate when input power is applied.
(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.
(6) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing.
External Capacitors: The PT7761 series requires a minimum ouput capacitance of 330F for proper operation. The PT7761 also requires a minimum input capacitance
of 1,500F, 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 Inductor: An input inductor is optional for most applications. The input inductor must be sized to handle 30ADC with a typical value of 1H.
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