參數(shù)資料
型號(hào)： TPS51427ARHBT
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, PQCC32
封裝： 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁數(shù)： 34/42頁
文件大?。?/td> 2131K
代理商： TPS51427ARHBT
ELECTRICAL CHARACTERISTICS
SLUS843B – MAY 2008 – REVISED SEPTEMBER 2008 .................................................................................................................................................. www.ti.com
Over recommended free-air temperature range, VV5DRV = 5 V, VVIN = 12 V (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INPUT SUPPLIES
VIN Input Voltage Range
LDO in regulation
5.5
28
V
VIN Operating Supply Current
LDO switched over to VSW, 4.5-V to 5.5-V SMPS
5
10
A
5.5 V
≤ VVIN ≤ 28 V, TA = +25°C, no load, EN_LDO = 5
VIN Standby Current
115
150
A
V, EN1 = EN2 = VSW = 0 V
5.5 V
≤ VVIN ≤ 28 V, TA = +25°C, no load, EN_LDO =
VIN Shutdown Current
12
20
A
EN1 = EN2 = VSW = 0 V
TA = +25°C, no load, EN_LDO = EN1 = EN2 = REFIN2
Quiescent Power Consumption
= 5 V, VFB1 = SKIPSEL = 0 V, VOUT1 = VSW = 5.3 V,
5
7
mW
VOUT2 = 3.5 V
PWM CONTROLLERS
5-V Preset output: 5.5 V
≤ VVIN ≤ 28 V,
4.975
5.125
5.05
VFB1 = 0 V, SKIPSEL = 5 V
(–1.5%)
(+1.5%)
1.5-V Preset output: 5.5 V
≤ VVIN ≤ 28 V,
1.482
1.518
VOUT1 Output Voltage Accuracy
1.50
V
VFB1 = 5V, SKIPSEL = 5V
(–1.2%)
(+1.2%)
Adjustable feedback output,
0.693
0.707
0.70
5.5 V
≤ VVIN ≤ 28 V, SKIPSEL = 5 V
(–1%)
(+1%)
VOUT1 Voltage Adjust Range
0.707
5.900
V
5-V Preset output
0.20
V
VFB1 Threshold Voltage
1.5-V Preset output
3.90
V
VFB1 Input Current
VFB1 = 0.8 V
–0.20
0.20
A
3.285
3.375
3.3-V Preset output: REFIN2 = 5 V, 5.5 V
≤ VVIN ≤ 28 V,
3.33
SKIPSEL = 5 V
(–1.4%)
(+1.4%)
1.038
1.062
1.05-V Preset output: REFIN2 = 3.3 V,
VOUT2 Output Voltage Accuracy
1.05
V
5.5 V
≤ VVIN ≤ 28 V, SKIPSEL= 5 V
(-1.2%)
(+1.2%)
0.99
1.01
Tracking output: REFIN2 = 1.0 V, 5.5 V
≤ VVIN ≤ 28 V,
1.00
SKIPSEL = 5 V
(-1%)
(+1%)
REFIN2 Voltage Adjust Range
0.50
2.50
V
REFIN2 Input Current
0.5 V
≤ VVREFIN2 ≤ 2.5 V
–0.2
0.2
A
1.05-V Preset output
3.00
3.45
REFIN2 Threshold Voltage
V
3.3-V Preset output
3.90
Either SMPS, SKIPSEL = 5 V, 0 A to 5 A(1)
–0.10%
DC Load Regulation
Either SMPS, SKIPSEL = 2 V, 0 A to 5 A(1)
–2.20%
Either SMPS, SKIPSEL = GND, 0 A to 5 A(1)
–0.50%
Line Regulation
Either SMPS, 5.5 V < VIN < 28 V(1)
0.005
%/V
TONSEL = 0 V, 2 V, or OPEN (400 kHz),
895
1052
1209
VOUT1 = 5.05 V
Channel1 On-Time
ns
TONSEL = 5 V (200 kHz), VOUT1 = 5.05 V
1895
2105
2315
TONSEL = 0 V (500 kHz), VOUT2 = 3.33 V
475
555
635
Channel2 On-Time
ns
TONSEL = 2 V, OPEN, or 5 V (300 kHz),
833
925
1017
VOUT2 = 3.33 V
Minimum Off-Time
300
400
500
ns
Soft Start Ramp Time
Zero to full limit
1.8
ms
VOUT1, VOUT2 Discharge On
EN1 = EN2 = 0 V, VOUT1 = VOUT2 = 0.5 V
17
35
Resistance
OOA Operating Frequency
SKIPSEL = 2 V or OPEN
22
30
kHz
(1)
Ensured by design. Not production tested.
4
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TPS51427A
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