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參數(shù)資料
| 型號(hào)： | FAN5602 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Universal (Step-Up/Step-Down) Charge Pump Regulated DC/DC Converter |
| 中文描述： | 通用（降壓型）電荷泵穩(wěn)壓DC / DC變換器 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 616K |
| 代理商： | FAN5602 |
10
REV. 1.1 10/7/04
FAN5602
PRODUCT SPECIFICATION
Block Diagram
BAND GAP
SOFT START
CURRENT
SENSE
PFM
MODE
SC
UVLO
OSCILLATOR
VIN
VOUT
C
DRIVER
EN
Light load
FB
FB
BG
BG
REF
VIN
150mV
VOUT
1.6V
VIN
H
EN
ERROR
AMP
VIN
GND
C1+
C1-
C2+
C2-
VOUT
ENABLE
S
W
I
T
C
H
A
R
R
A
Y
Functional Description
FAN5602 is a high efficiency and low noise switched-capac-
itor DC/DC converter and is capable of both step-up and
step-down operations. It has seven built-in switch configura-
tions. Based on the ratio of the input voltage to the output
voltage the FAN5602 automatically reconfigures the
switches to achieve the highest efficiency. The regulation of
the output is achieved by a linear regulation loop, which
modulates the on-resistance of the power transistors so that
the amount of charge transferred from the input to the flying
capacitor at each clock cycle is controlled and is equal to the
charge needed by the load. The current spike is reduced to
minimum. At light load the FAN5602 automatically switches
to PFM mode to save power. The regulation at PFM mode is
achieved by skipping pulses.
Linear Regulation Loop
The FAN5602 operates at constant frequency at load higher
than 10mA. The linear regulation loop consisting of power
transistors, feedback (resistor divider) and error amplifier is
used to realize the regulation of the output voltage and to
reduce the current spike. The error amplifier takes feedback
and reference as inputs and generates the error voltage sig-
nal. The error voltage signal is then used as the gate voltage
of the power transistor and modulates the on-resistance of
the power transistor and therefore the charge transferred
from the input to the output is controlled and the regulation
of the output is realized. Since the charge transfer is con-
trolled, the FAN5602 has small ESR spike.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN5602_07 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Universal (Step-Up/Step-Down) Charge Pump Regulated DC/DC Converter |
| FAN5602_0705 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Universal (Step-Up/Step-Down) Charge Pump Regulated DC/DC Converter |
| FAN5602_09 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Universal (Step-Up/Step-Down) Charge Pump Regulated DC/DC Converter |
| FAN5602MP33X | 功能描述:電荷泵 Reg Charge Pump DC/DC RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| FAN5602MP45X | 功能描述:電荷泵 Reg Step-Down Charge Pump DC/DC Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
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