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參數(shù)資料
| 型號(hào)： | TPS76828QDRG4 |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS |
| 中文描述： | 快速瞬態(tài)響應(yīng)1 -低壓差電壓調(diào)節(jié)器 |
| 文件頁(yè)數(shù)： | 16/23頁(yè) |
| 文件大?。?/td> | 430K |
| 代理商： | TPS76828QDRG4 |
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PG
OUT
OUT
7
6
5
IN
IN
EN
GND
3
16
14
13
V
I
C1
0.1
μ
F
PG
V
O
10
μ
F
+
TPS768xx
C
o
250 k
VO
Vref
1
R1
R2
where:
V
ref
= 1.1834 V typ (the internal reference voltage)
(1)
R1
VO
Vref
1
R2
(2)
OUTPUT
VOLTAGE
2.5 V
3.3 V
3.6 V
4.75 V
R1
R2
UNIT
33.2
53.6
61.9
90.8
30.1
30.1
30.1
30.1
k
k
k
k
OUTPUT VOLTAGE
PROGRAMMING GUIDE
V
O
V
I
PG
OUT
FB / NC
GND
R1
R2
EN
IN
≤
0.9 V
≥
1.7 V
TPS76801
PG
0.1
μ
F
250 k
POWER-GOOD INDICATOR
The TPS768xx features a power-good (PG) output that can be used to monitor the status of the regulator. The
internal comparator monitors the output voltage: when the output drops to between 92% and 98% of its nominal
regulated value, the PG output transistor turns on, taking the signal low. The open-drain output requires a pullup
resistor. If not used, it can be left floating. PG can be used to drive power-on reset circuitry or used as a
low-battery indicator. PG does not assert itself when the regulated output voltage falls out of the specified 2%
tolerance, but instead reports an output voltage low, relative to its nominal regulated value.
TPS76815Q, TPS76818Q, TPS76825Q
TPS76827Q, TPS76828Q, TPS76830Q
TPS76833Q, TPS76850Q, TPS76801Q
SLVS211J–JUNE 1999–REVISED OCTOBER 2004
APPLICATION INFORMATION (continued)
Figure 26. Typical Application Circuit (Fixed Versions)
The output voltage of the TPS76801 adjustable regulator is programmed using an external resistor divider as
shown in Figure 27. The output voltage is calculated using:
Resistors R1 and R2 should be chosen for approximately 50-μA 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 μA and then calculate R1 using:
Figure 27. TPS76801 Adjustable LDO Regulator Programming
16
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS76828QPWP | 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Trans-Resp 1-A 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(dòng)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 |
| TPS76828QPWPG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Trans-Resp 1-A 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(dòng)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 |
| TPS76828QPWPR | 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Trans-Resp 1-A 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(dòng)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 |
| TPS76828QPWPRG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Fast-Trans-Resp 1-A 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(dòng)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 |
| TPS76830QD | 功能描述:低壓差穩(wěn)壓器 - LDO Micropower LDO Reg 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(dòng)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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