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参数资料
| 型号： | LSP3601SH |
| 厂商： | LITE-ON SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | SOP-8 |
| 文件页数： | 12/14页 |
| 文件大小： | 425K |
| 代理商： | LSP3601SH |
Liteon Semiconductor Corporation
LSP3601
Step-Up DC/DC Controller
7/14
Rev1.3
TIMING WAVEFORM
ON
Soft start
ts
DETAILED DESCRIPTION
Voltage reference
A 1.25V regulator operating from VCC is used to power the internal circuitry of the LSP3601. An internal resister
divider provides 0.5V reference for the error amplifier, Soft-start (typ. 0.9V) and SCP (typ.0.8V).
Error amplifier
The error amplifier compares a sample of the dc-dc converter output voltage to the 0.5V reference and generates an
error signal for the PWM comparator. Output voltage of the dc-dc converter is setting with the resistor divider using
the following expression (see fig12):
VOUT = (1+R1/ R2)*0.5
SW
OFF
Power supply control
Output
short
circuit
Output short circuit
tpe
Short circuit
detection
ence input for short circuit
detection comparator
COMP pin voltage
SCP pin waveforms
OUT pin waveforms
Soft start setting voltage
Idle period setting voltage
Refer
500
R2
LSP3601
R1
-
+
Error Amplifier
8
36K
1
0.5V
C1
Vout
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