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參數(shù)資料
| 型號： | 75425-EP |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | POWER GOOD FAST-TRANSIENT-RESPONSE 2-A LOW-DROPOUT VOLTAGE REGULATORS |
| 中文描述： | 電源良好快速瞬態(tài)響應(yīng)2 -低壓差電壓調(diào)節(jié)器 |
| 文件頁數(shù)： | 19/27頁 |
| 文件大?。?/td> | 388K |
| 代理商： | 75425-EP |
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TPS75201-EP TPS75215-EP TPS75218-EP TPS75225-EP TPS75233-EP WITH RESET
TPS75401-EP
’
75415-EP
’
75418-EP
’
75425-EP
’
75433-EP WITH POWER GOOD
FAST-TRANSIENT-RESPONSE 2-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS165
–
APRIL 2003
19
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
programming the TPS75x01 adjustable LDO regulator
The output voltage of the TPS75x01 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 40-
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
R2 = 30.1 k
to set the divider current at 40
μ
A and then calculate R1 using:
recommended
design
procedure
is
to
choose
R1
VO
Vref
1
R2
(2)
OUTPUT
VOLTAGE
2.5 V
3.3 V
3.6 V
R1
R2
UNIT
33.2
53.6
61.9
30.1
30.1
30.1
k
k
k
OUTPUT VOLTAGE
PROGRAMMING GUIDE
VO
VI
RESET/
PG
OUT
FB/SENSE
GND
R1
R2
EN
IN
≤
0.7 V
≥
2 V
TPS75x01
RESET or PG Output
0.22
μ
F
250 k
NOTE: To reduce noise and prevent
oscillation, R1 and R2 need to be as close
as possible to the FB/SENSE terminal.
CO
Figure 24. TPS75x01 Adjustable LDO Regulator Programming
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