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參數(shù)資料
| 型號(hào)： | LPO4812 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Up to 500 mA, High Efficiency Synchronous Step-Down DC-DC Converter |
| 中文描述： | 多達(dá)500個(gè)，高效率同步降壓毫安型DC - DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 4/16頁(yè) |
| 文件大小： | 162K |
| 代理商： | LPO4812 |
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NCP1511
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS
(V
in
= 3.6 V, Vo = 1.5 V, T
A
= 25
°
C, Fsyn = 600 kHz 50% Duty Cycle square wave for PWM
mode; T
A
= –30 to 85
°
C for Min/Max values, unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
VCC Pin
Quiescent Current of Sync Mode, I
out
= 0 mA
Iq PWM
175
A
Quiescent Current of PWM Mode, I
out
= 0 mA
Iq PWM
185
A
Quiescent Current of Pulsed Mode, I
out
= 0 mA
Iq Pulsed
14
A
Quiescent Current, SHD Low
Iq Off
0.1
0.5
A
Input Voltage Range (Note 3)
Vin
2.5
5.2
V
Sync Pin
Input Voltage
Vsync
0.3
Vcc + 0.3
V
Frequency Operational Range
Fsync
500
600
1000
kHz
Minimum Synchronization Pulse Width
Dcsync Min
30
%
Maximum Synchronization Pulse Width
Dcsync Max
70
%
SYNC “H” Voltage Threshold
Vsynch
920
1200
mV
SYNC “L” Voltage Threshold
Vsyncl
400
830
mV
SYNC “H” Input Current, Vsync = 3.6 V
Isynch
2.2
A
SYNC “L” Input Current, Vsync = 0 V
Isyncl
0.5
A
Output Level Selection Pins
Input Voltage
Vcb
0.3
Vcc + 0.3
V
CB0, CB1 “H” Voltage Threshold
Vcb h
920
1200
mV
CB0, CB1 “L” Voltage Threshold
Vcb l
400
830
mV
CB0 “H” Input Current, CB = 3.6 V
Icb0 h
2.2
A
CB0 “L” Input Current, CB = 0 V
Icb0 l
0.5
A
CB1 “H” Input Current, CB = 3.6 V
Icb1 h
0.3
1.0
A
CB1 “L” Input Current, CB = 0 V
Icb1 l
2.2
A
Shutdown Pin
Input Voltage
Vshd
0.3
Vcc + 0.3
V
SHD “H” Voltage Threshold
Vshd h
920
1200
mV
SHD “L” Voltage Threshold
Vshd l
400
830
mV
SHD “H” Input Current, SHD = 3.6 V
Ishd h
2.2
A
SHD “L” Input Current, SHD = 0 V
Ishd l
0.5
A
Feedback Pin
Input Voltage
Vfb
0.3
Vcc + 0.3
V
Input Current, Vfb = 1.5 V
Ifb
5.0
7.5
A
Sync PWM Mode Characteristics
Switching PFET Current Limit
I lim
800
mA
Minimum On Time
Ton min
75
nsec
Rdson Switching PFET and N_FET
Rdson
0.23
Switching PFET and NFET Leakage Current
Ileak
0
1.0
A
Output Overvoltage Threshold
Vo
5.0
%
3. Recommended maximum input voltage is 5 V when the device frequency is synchronized with an external clock signal.
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