RT9921PQV データシートの表示（PDF） - Richtek Technology
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RT9921PQV Datasheet PDF : 15 Pages
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Preliminary
RT9921
VGL Output Voltage vs. Output Current
-5.8
VZ = 6.8V
-5.9
Boost Start Up
IOUT = 200mA
-6
VAVDD
(5V/Div)
-6.1
VIN = 5V
VLDO
(5V/Div)
VIN = 3V
VIN
-6.2
VIN = 4V
(5V/Div)
-6.3
-6.4
0
IIN
(500mA/Div)
5
10
15
20
25
30
Output Current (mA)
Time (2.5ms/Div)
Boost Load Transient Response
VIN = 3.3V, VOUT = 8.5V, FSW = 640kHz
VAVDD
(500mV/Div)
IAVDD
(200mA/Div)
IL
(1A/Div)
GPM with VFLK
VIN = 3.3V, VOUT = 8.5V, FSW = 640kHz
VFLK
(5V/Div)
VGH Ripple
(1V/Div)
http://www.DataSheet4U.net/
VGHM
(10V/Div)
Time (250μs/Div)
Time (5μs/Div)
Power On Sequence with VGL
VLDO
(2V/Div)
VAVDD
(5V/Div)
VGH
(20V/Div)
VGL
(5V/Div)
VIN = 3.3V, VOUT = 8.5V
Time (2.5ms/Div)
VLDO
(2V/Div)
VAVDD
(5V/Div)
VGH
(20V/Div)
VGL
(5V/Div)
Power Off Sequence with VGL
VIN = 3.3V, VOUT = 8.5V
Time (10ms/Div)
DS9921-00 November 2007
www.richtek.com
9
datasheet pdf - http://www.DataSheet4U.net/
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