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參數(shù)資料
| 型號： | TPS77718PWPR |
| 英文描述： | VOLT REGULATOR|FIXED|+1.8V|CMOS|TSSOP|20PIN|PLASTIC |
| 中文描述： | 電壓調(diào)節(jié)器|定額| 1.8 |的CMOS | TSSOP封裝| 20針|塑料 |
| 文件頁數(shù)： | 18/21頁 |
| 文件大小： | 318K |
| 代理商： | TPS77718PWPR |
TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401
/
415
/
418
/
427
/
428
/
433
/
450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E
–
FEBRUARY 2000
–
REVISED JULY 2001
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
programming the TPS77x01 adjustable LDO regulator
The output voltage of the TPS77x01 adjustable regulator is programmed using an external resistor divider as
shown in Figure 24. The output voltage is calculated using:
VO
Vref
1
R1
R2
(1)
Where:
V
ref
= 1.1834 V typ (the internal reference voltage)
Resistors R1 and R2 should be chosen for approximately 50-
μ
A divider current. Lower value resistors can be
used but offer no inherent advantage and waste more power. Higher values should be avoided, as leakage
currents at FB increase the output voltage error. The recommended design procedure is to choose
R2 = 30.1 k
to set the divider current at 50
μ
A and then calculate R1 using:
R1
VO
Vref
1
R2
(2)
OUTPUT
VOLTAGE
2.5 V
3.3 V
3.6 V
R1
R2
UNIT
33.5
53.8
61.5
30.1
30.1
30.1
k
k
k
OUTPUT VOLTAGE
PROGRAMMING GUIDE
VO
VI
PG or
RESET
OUT
FB/SENSE
GND
R1
R2
EN
IN
TPS77x01
PG or RESET Output
0.1
μ
F
250 k
CO
NOTE: To reduce noise and prevent
oscillation, R1 and R2 need to be as
close as possible to the FB/SENSE
terminal.
Figure 24. TPS77x01 Adjustable LDO Regulator Programming
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| TPS77718PWPRG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Tran-Res 750-mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS77725D | 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Tran-Res 750-mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS77725DG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Tran-Res 750-mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS77725DR | 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Tran-Res 750-mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS77725DRG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Tran-Res 750-mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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