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HT7750 Datasheet(PDF) 5 Page - Holtek Semiconductor Inc

Part # HT7750
Description  PFM Step-up DC/DC Converter
PDF  15 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT7750 Datasheet(HTML) 5 Page - Holtek Semiconductor Inc

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HT7750, +5.0V Output Type
VIN=VOUT
´0.6; IOUT=10mA; Ta=25°C (Unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VOUT
Output Voltage
¾
4.875
5
5.125
V
VIN
Input Voltage
¾¾
¾
6V
VSTART
Start-up Voltage
VIN:0
®2V; IOUT=1mA
¾
0.7
0.8
V
VHOLD
Min. Hold-on Voltage
VIN:2
®0V; IOUT=1mA
¾¾
0.7
V
IIN
Current Consumption
Measured at no load
¾
10
¾mA
IDD1
Supply Current 1
VIN=VOUT
´0.95
Measured at VOUT pin
¾
85
¾mA
IDD2
Supply Current 2
VIN=VOUT+0.5V
Measured at VOUT pin
¾
47
mA
ISHDN
Shutdown Current
VCE=VIL,VIN=VOUT
´0.95
¾
0.5
¾mA
ILEAK
LX Leakage Current
VIN=6V
¾¾
0.9
mA
fOSC
Maximum Oscillator Frequency
VIN=VOUT
´0.95
Measured at LX pin
¾
115
¾
kHz
h
Efficiency
¾¾
85
¾
%
DOSC
Oscillator Duty Cycle
VIN=VOUT
´0.95
Measured at LX pin
65
75
85
%
Typical Performance Characteristics
L=220
mH, C=47mF
HT7730 Efficiency vs. Output Current
HT77XX
Rev 1.10
5
March 7, 2006
5 0
5 5
6 0
6 5
7 0
7 5
8 0
8 5
9 0
0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
1 0 0
O u t p u t C u r r e n t ( m A )
V I N = 0 . 9 V
V I N = 1 . 2 V
V I N = 1 . 5 V
V I N = 1 . 8 V
V I N = 2 . 0 V



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