參數(shù)資料
型號： TPS77228DGK
廠商： Texas Instruments, Inc.
英文描述： 150-mA LDO REGULATORS WITH INTEGRATED RESET OR PG
中文描述： 150毫安LDO穩(wěn)壓器與集成復(fù)位或PG
文件頁數(shù)： 20/23頁
文件大?。?/td> 357K
代理商： TPS77228DGK
TPS77101, TPS77118, TPS77127, TPS77128, TPS77133 WITH RESET OUTPUT
TPS77201, TPS77218, TPS77227, TPS77228, TPS77233 WITH POWER GOOD OUTPUT
150-mA LDO REGULATORS WITH INTEGRATED RESET OR PG
SLVS225A – FEBRUARY 2000 – REVISED MARCH 2000
20
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 28. 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 7-
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 7
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
174
287
324
169
169
169
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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS77228DGKG4 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Transient-Resp 150-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
TPS77228DGKR 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Transient-Resp 150-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
TPS77228DGKRG4 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Transient-Resp 150-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
TPS77233DGK 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Transient-Resp 150-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
TPS77233DGKG4 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Transient-Resp 150-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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