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參數(shù)資料
| 型號： | PT6948C |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 6 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, SMA27 |
| 封裝： | SMD-27 |
| 文件頁數(shù)： | 4/11頁 |
| 文件大小： | 216K |
| 代理商： | PT6948C |
For technical support and more information, see inside back cover or visit www.ti.com
PT6940 Series
6-A Dual Output 5-V/3.3-V Input
Integrated Switching Regulator
General Specifications (Unless otherwise stated, Ta =25°C, Vin =5V, Cin =330F, Co1 =330F, Co2 =330F, and Io1/Io2 =Iomax)
PT6940 Series
Characteristic
Symbol
Conditions
Min
Typ
Max
Units
Output Current
Io (1)
Ta =25°C, natural convection
0.1 (2)
—6
A
Ta =60°C, 200LFM airflow
0.1(2)
—6
Input Voltage Range
Vin
OverIoRange
Vo1 ≤2.5V
3.1
—
5.5
V
Vo1 >2.5V
4.5
—
5.5
Set Point Voltage Tolerance
Vo tol
—
±0.5
±2
%Vo
Temperature Variation
Regtemp
–40°
≤Ta≤ +85°C, Io =Iomin
—
±0.5
—
%Vo
Line Regulation
Regline
Over Vin range
—
±5
±10
mV
Load Regulation
Regload
Over Io range
—
±5
±10
mV
Total Output Voltage Variation
Votot
Includes set-point, line, load,
Vo =3.3V
—
±43
±100
–40°
≤Ta ≤ +85°C
Vo =2.5V
—
±35
±75
Vo =1.8V
—
±28
±54
mV
Vo =1.5V
—
±25
±45
Vo =1.2V
—
±22
±36
Efficiency
η
Vin =5V, Io1 = Io2 =4A
PT6941
—
92
—
PT6942
—
91
—
PT6943
—
90
—
%
PT6944
—
90
—
PT6946
—
89
—
PT6947
—
88
—
PT6948
—
87
—
Vo Ripple (pk-pk)
Vr
20MHz bandwidth
—
35
—
mVpp
TransientResponse
ttr
1A/s load step, 50% to 100% Iomax
—
60
—
s
Vtr
Vo over/undershoot
—
±70
—
mV
Short Circuit Threshold
Isc(pk)
Reset followed by auto-recovery
—
13 (3)
—A
Switching Frequency
o
Over Vin range
300
350
400
kHz
STBY* (Pin 1)
Referenced to GND (pin 7)
Input High Voltage
VIH
—
Open (4)
V
Input Low Voltage
VIL
–0.1
—
+0.4
Input Low Current
IIL
—
-0.5
–
mA
Quiescent Current
Iin standby
pin 1 to GND
—
10
20
mA
External Output Capacitance
Both outputs
330
—
TBD
F
Operating Temperature Range
Ta
Over Vin Range
–40 (5)
—
+85 (6)
°C
Storage Temperature
Ts
—
–40
—
+125
°C
Mechanical Shock
Per Mil-STD-883D, Method 2002.3
1msec,Sine,mounted
—
TBD
—
G’s
Mechanical Vibration
Mil-STD-883D Method 2007.2,
Vertical
—
TBD (7)
—
G’s
20-2000 Hz
Horizontal
—
TBD (7)
—
Weight
—
Vertical/Horizontal
—
34
—
grams
Flammability
—
MeetsUL94V-O
Notes:
(1) The outputs, Vo1 and Vo2, have similar characteristics. The applicable performance parameters are defined according to output voltage.
(2) The minimum output current applies to each output. The module will operate at no load with reduced specifications.
(3) A short-circuit load fault at either output causes the module to continuously reset, affecting both outputs.
(4) The STBY* control (pin 1) has an internal pull-up, and if it is left open circuit the module will operate when input power is applied. The open-circuit voltage
is approximately the input voltage, Vin. Refer to the application notes for interface considerations.
(5) For operating temperatures below 0°C, Cin, Co1, and Co2 must have stable characteristics. Use either tantalum or Oscon capacitors.
(6) See Safe Operating Area curves for the specific output voltage combination, or contact the factory for the appropriate derating.
(7) Only the case pins on through-hole pin configurations (N & A) must be soldered. For more information see the applicable package outline drawing.
Input/Output Capacitors: The PT6940 series requires a 330F electrolytic capacitor at the input and both outputs for proper operation (300F for Oscon or low ESR
tantalum). In addition, the input capacitance must be rated for a minimum of 1.0Arms ripple current. For transient or dynamic load applications, additional capacitance
may be required. Refer to the application notes for more information.
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