HT77XX 查看數據表（PDF） - Holtek Semiconductor
零件编号
产品描述 (功能)
比赛名单
HT77XX Datasheet PDF : 19 Pages
| |||
HT77XX
Thermal Information
Symbol
Parameter
Thermal Resistance
qJA
(Junction to Ambient)
(Assume no ambient airflow,
no heat sink)
PD Power Dissipation
Note: PD is measured at Ta= 25°C
Package
SOT89
TO92
SOT23
SOT23-5
SOT89
TO92
SOT23
SOT23-5
Max.
300
300
330
320
0.33
0.33
0.3
0.31
Unit
°C/W
°C/W
°C/W
°C/W
W
W
W
W
Electrical Characteristics
VIN=VOUT´0.6; IOUT=10mA; Ta=25°C (Unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
VIN
Input Voltage
¾
¾
DVOUT
VSTART
VHOLD
IIN
Output Voltage Tolerance
¾
Start-up Voltage (Fig. 1)
VIN: 0®2V; IOUT=1mA
Minimum Hold-on Voltage (Fig. 1) VIN: 2®0V; IOUT=1mA
No-load Input Current (Fig. 1) IOUT=0mA
-2.5
¾
¾
¾
VOUT=1.8V ¾
VOUT=2.2V ¾
IDD1
Supply Current 1 (Fig. 2)
VOUT=2.7V ¾
VS=VOUT´0.95
Measured at VOUT pin
VOUT=3.0V
¾
VOUT=3.3V ¾
VOUT=3.7V ¾
VOUT=5.0V ¾
IDD2
Supply Current 2 (Fig. 2)
VS=VOUT+0.5V
Measured at VOUT pin
¾
ISHDN
Shutdown Current
CE=GND
¾
VIH
CE High Threshold
¾
2
VIL
CE Low Threshold
¾
¾
ILEAK
LX Leakage Current (Fig. 3)
VS=VOUT+0.5V, VX=6V
Measured at the LX pin
¾
fOSC
Maximum Oscillator Frequency VS=VOUT´0.95
(Fig. 3)
Measured at LX pin
¾
Typ.
¾
¾
0.7
¾
10
35
37
40
45
55
64
85
4
0.5
¾
¾
¾
115
Max.
6
2.5
0.9
0.7
20
50
55
60
68
81
85
134
7
1
¾
0.4
0.9
¾
Unit
V
%
V
V
mA
mA
mA
mA
V
V
mA
kHz
DOSC
h
Oscillator Duty Cycle (Fig. 3)
Efficiency
VS=VOUT´0.95
Measured at LX pin
VOUT£2.2V
VOUT³2.7V
65 75 85 %
¾ 80 ¾
%
¾ 85 ¾
Note: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Ratings
indicate conditions for which the device is intended to be functional, but do not guarantee specific performance
limits. The guaranteed specifications apply only for the test conditions listed.
Rev 1.90
3
October 13, 2010
Share Link: 