BD9528AMUV Datasheet, PDF (10/30 Pages) Rohm – High Performance Regulators for PCs Main Power Supply for Notebook PCs(With Built-in Linear Regulator)

BD9528AMUV
●Reference data
Technical Note
Vo
50mV/div
Vo
50mV/div
Vo
50mV/div
2μs
Fig.37 Output Voltage
(Vo=1V, PWM, Io=8A)
10μs
Fig.38 Output Voltage
(Vo=1V, QLLM, Io=0A)
2μs
Fig.39 Output Voltage
(Vo=1V, SLLM, Io=0A)
EN1
5V/div
Vo1
2V/div
EN2
5V/div
Vo2
2V/div
EN1
5V/div
Vo1
2V/div
EN2
5V/div
Vo2
2V/div
EN1
5V/div
Vo1
2V/div
EN2
5V/div
Vo2
2V/div
Fig.40 Wake up waveform
(EN1=EN2)
Fig.41 Wake up waveform
(EN2→EN1)
Fig.42 Wake up waveform
(EN1→EN2)
Fig.43 Wake up waveform
(EN1/2→PGOOD1/2)
IOUT-frequency (VOUT=5V, R(FS)=68kΩ)
EN1
500
5V/div
PGOOD1
450
2V/div
400
EN2
5V/div
PGOOD2
350
2V/div
V IN = 7.5V
VIN=12V
VIN=18V
300
0
1
2
3
4
5
6
7
IOUT [A]
Fig.44 Io-frequency
(Vo=5V, PWM, RFS=68kΩ)
IOUT-frequency (VOUT=5V, R(FS)=68kΩ)
500
450
400
V IN = 7 .5 V
VIN=12V
350
VIN=18V
300
0
1
2
3
4
5
6
7
IOUT [A]
Fig.45 Io-frequency
(Vo=3.3V, PWM, RFS=68kΩ)
2.5
V OU T=5 V
2
V OU T=3 .3V
1.5
1
0.5
0
0
50
100
150
RFS [kΩ]
Fig.46 FS-ONTIME
700
600
500
400
300
200
100
0
0
V OU T=5V
V OU T=3.3V
50
100
150
RFS [kΩ]
Fig.47 FS-frequency
5.500
5.000
4.500
4.000
3.500
3.000
2.500
2.000
1.500
1.000
0.500
0.000
0
V IN =7.5V ( -5℃ ）
VIN=21V（-5℃）
V IN =7.5V ( 75℃ ）
VIN=21V（75℃）
2
4
6
8
10
12
14
16
IOUT [A]
Fig.48 Ta-IOCP
(Vo=5V)
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10/29
2011.11 - Rev.A