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AP1625 Datasheet(PDF) 3 Page - Anachip Corp

No. de pieza AP1625
Descripción Electrónicos  PWM/PFM Dual Mode Step-down DC/DC Controller
PDF  5 Pages
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Fabricante Electrónico  ANACHIP [Anachip Corp]
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AP1625 Datasheet(HTML) 3 Page - Anachip Corp

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AP1625
PWM/PFM Dual Mode Step-down DC/DC Controller
Anachip Corp.
www.anachip.com.tw
Rev.1.1 May.27, 2004
3/5
Electrical Characteristics
AP1625
（
VOUT＝3.3V, FOSC＝270KHz）
Ta=25°C
Parameter
Symbol
Conditions
Min. Typ. Max.
Unit
FB
VFB
1.17
1.2
1.23
V
Maximum Input Voltage
VIN
8
V
UVLO Voltage（min. operating
voltage）
VUVLO
Same as IDD, voltage required to
maintain H at VOUT
2.2
V
Supply Current
IDD
No external components,
CE=VIN, VOUT=0V
40
110
µA
Stand-by Current
ISTB
No external components,
CE=VIN, VOUT=0V
2
µA
Oscillator Frequency
Fosc
Measuring
of
EXT/waveform,
VIN=output voltage+0.3V
230
270
310
KHz
Maximum Duty Ratio
MAXDTY
100
%
PFM Duty Ratio
PFMDTY NO load (AP1625 only)
15
25
35
%
CE”High” Voltage
VCEH
NO external components, VFB=0V,
apply 0.65V (min.) to CE,determine
VOUT”Low”
0.5
Vcc
CE”Low” Voltage
VCEL
Same
as
VCEH,
determine
EXT/”High”
0.20
V
Efficiency
EFFI
92
%
Soft-Start Time
Tss
Use a 33 nF Capacitor
5
15
msec
Measuring conditions: Unless otherwise specified, connect external components. VIN=5.0V,LOUT=220mA
Series Amendment:
AP1625
External Components: Css ＝0.033µF, Rss＝470kΩ
The Following Parameter Applies:
Soft Start Time（Tss）:Connect Rss,CSS. CE,0V→3.0V（When VIN<3.0V, VIN＝3.0V）



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