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)： 38/42頁
文件大小： 2131K
代理商： TPS51427ARHBT
www.ti.com .................................................................................................................................................. SLUS843B – MAY 2008 – REVISED SEPTEMBER 2008
ELECTRICAL CHARACTERISTICS (continued)
Over recommended free-air temperature range, VV5DRV = 5 V, VVIN = 12 V (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
LINEAR REGULATOR (LDO)
4.94
5.11
LDOREFIN = VSW = 0 V, 0 < ILDO < 10 0mA,
5.025
6 V< VIN< 28 V
(–1.7%)
(+1.7%)
3.28
3.38
LDOREFIN = 5 V, VSW = 0 V, 0 < ILDO < 100 mA,
LDO Output Voltage
3.33
V
5.5 V < VIN < 28 V
(–1.5%)
(+1.5%)
0.98
1.02
LDOREFIN = 0.5 V, VSW = 0 V, 0 < ILDO < 50 mA,
1.00
5.5V < VIN < 28 V
(–2%)
(+2%)
LDOREFIN Input Range
VLDO = 2 × VLDOREFIN
0.35
2.25
V
LDOREFIN Leakage Current
VLDOREFIN = 0 V or 5 V
–0.5
0.5
A
Fixed LDO = 5 V
0.15
LDOREFIN Threshold Voltage
V
Fixed LDO = 3.3 V
3.90
LDO Output Current
VSW = GND , VIN = 5.5 V to 28 V
100
mA
LDO Output Current During
VSW = 5 V , VIN = 5.5 V to 28 V, LDOREFIN = 0 V
340
500
mA
Switchover to 5 V
LDO Output Current During
VSW = 3.3 V , VIN = 5.5 V to 28 V, LDOREFIN = 5 V
330
500
mA
Switchover to 3.3 V
LDO Short-Circuit Current
VSW = LDO = 0 V
140
180
220
mA
4.63
4.78
4.93
Rising edge of VSW, LDOREFIN = 0 V
(92.6%)
(95.6%)
(98.6%)
LDO 5-V Switchover Threshold
V
Hysteresis
0.20
3.05
3.15
3.25
Rising edge of VSW, LDOREFIN = 5 V
(92.5%)
(95.5%)
(98.5%)
LDO 3.3-V Switchover Threshold
V
Hysteresis
0.150
LDO Switchover Switch On
LDO to VSW, VSW = 5 V, ILDO = 100 mA
0.7
1.5
Resistance
LDO Switchover Delay
Turning on
3.96
ms
Falling edge of V5FILT
3.80
3.93
4.10
LDO Undervoltage Lockout
V
Threshold
Rising edge of V5FILT
4.20
4.37
4.50
Falling edge of VIN
1.8
VIN POR Threshold
V
Rising edge of VIN
2.1
Thermal-Shutdown Threshold
Hysteresis = +10°C (2)
+140
°C
3.3V ALWAYS-ON LINEAR REGULATOR (VREF3)
3.250
3.350
No external load, VVSW > 4.5 V
3.300
(–1.5%)
(+1.5%)
VREF3 Output Voltage
V
3.220
3.380
No external load, VVSW < 4.0 V
3.300
(–2.4%)
(+2.4%)
VREF3 Load Regulation
0 mA < ILOAD < 10 mA
60
mV
VREF3 Current Limit
VREF3 = GND
15
20
mA
Falling edge of VREF3
2.96
VREF3 Undervoltage Lockout
V
Threshold
Hysteresis
0.17
(2)
Ensured by design. Not production tested.
Copyright 2008, Texas Instruments Incorporated
5
Product Folder Link(s): TPS51427A
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TPS51427RHBR 功能描述:DC/DC 開關(guān)控制器 Dual D-Cap Synch Step Down Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS51427RHBRG4 功能描述:DC/DC 開關(guān)控制器 Dual D-Cap Sync Step Down Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS51427RHBT 功能描述:DC/DC 開關(guān)控制器 Dual D-Cap Synch Step Down Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS51427RHBTG4 功能描述:DC/DC 開關(guān)控制器 Dual D-Cap Sync Step Down Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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