Richtek RT8239A, Руководство пользователя

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RT8239A/B/C
14
DS8239A/B/C-06 October 2012 www.richtek.com
© Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Power On from ENLDO
Time (2ms/Div)
V
IN
= 12V, V
ENTRIP1
= V
ENTRIP2
= 1.5V
LDO5
(2V/Div)
LDO3
(2V/Div)
ENLDO
(10V/Div)
CP
(10V/Div)
ENLDO = VIN, R
TON
= 100k Ω , No Load
Shutdown Input Current vs. Input Voltage
10
11
12
13
14
15
16
17
18
19
20
21
22
6 8 10 12 14 16 18 20 22 24 26
Input Voltage (V)
Shut
dow
n I
nput
C
u
rr
ent
(
μ
A)
1
V
ENTRIP1
= V
ENTRIP2
= 5V, ENLDO = GND, No Load
Power Off from ENTRIP1
Time (4ms/Div)
RT8239B/C
V
IN
= 12V, V
ENTRIP1
= V
ENTRIP2
= 1.5V,
ENLDO = VIN, R
TON
= 100k
Ω
, No Load
V
IN
= 12V, V
ENTRIP1
= V
ENTRIP2
= 1.5V,
ENLDO = VIN, R
TON
= 100k Ω , No Load
V
OUT1
(2V/Div)
PGOOD
(5V/Div)
ENTRIP1
(5V/Div)
RT8239B/C
Power On from ENTRIP1
Time (1ms/Div)
V
IN
= 12V, V
ENTRIP1
= V
ENTRIP2
= 1.5V,
ENLDO = VIN, R
TON
= 100k Ω , No Load
V
OUT1
(2V/Div)
PGOOD
(5V/Div)
ENTRIP1
(5V/Div)
RT8239B/C
Power Off from ENM
Time (10ms/Div)
V
OUT1
(5V/Div)
PGOOD
(5V/Div)
ENM
(5V/Div)
V
OUT2
(5V/Div)
RT8239A V
IN
= 12V, V
ENM
= 5V, R
TON
= 100k
Ω
,
V
ENTRIP1
= V
ENTRIP2
= 1.5V,
ENLDO = VIN, No Load
Power On from ENM
Time (1ms/Div)
V
OUT1
(2V/Div)
PGOOD
(5V/Div)
ENM
(5V/Div)
RT8239A
V
OUT2
(2V/Div)
V
ENTRIP1
= V
ENTRIP2
= 1.5V, ENLDO = VIN, No Load
V
IN
= 12V, V
ENM
= 5V, R
TON
= 100k Ω