HT77xxA
PFM Step-up DC/DC Converter
Features
· Low start-up voltage: 0.7V (Typ.)
· High efficiency: 85% (Typ.)
· Ultra low supply current IDD: 5mA (Typ.)
· Low ripple and low noise
· High output voltage accuracy: ±2.5%
· Low shutdown current: 0.5mA (Typ.)
· Output voltage: 2.7V, 3.0V, 3.3V, 5.0V
· 3-pin TO92, 3-pin SOT89, 3-pin SOT23 and
· Output current up to 200mA
5-pin SOT23 package
Applications
· Palmtops/PDAs
· Cameras/Camcorders
· Portable communicators/Smartphones
· Battery-powered equipment
General Description
The HT77xxA series is a set of PFM step-up DC/DC
converter with high efficiency and low ripple. The series
features extremely low start-up voltage and high output
voltage accuracy. They require only three external components to provide a fixed output voltage of 2.7V, 3.0V,
3.3V, 3.7V or 5.0V. CMOS technology ensures ultra low
supply current and makes them ideal for battery-operated applications powered from one or more
cells.
The HT77xxA consists of an oscillator, a PFM control
circuit, a driver transistor, a reference voltage unit, and a
high speed comparator. They employ pulse frequency
modulation (PFM) for minimum supply current and ripple at light output loading. These devices are available
in space saving 3-pin TO92, 3-pin SOT89, 3-pin SOT23
and 5-pin SOT23 packages. For 5-pin SOT23 package,
it also build-in a chip enable function to reduce power
consumption during shutdown mode.
Selection Table
Note:
Part No.
Output Voltage
HT7727A
2.7V
HT7730A
3.0V
HT7737A
3.7V
HT7733A
3.3V
HT7750A
5.0V
Package
Marking
TO92
SOT89
SOT23
SOT23-5
HT77xxA (for TO92)
HT77xxA (for SOT89)
7xxA (for SOT23)
7xxA (for SOT23-5)
²XX² stands for output voltages.
Block Diagram
V re f
L X
L X L im ite r
O S C
2 0 0 k H z
B u ffe r
P F M
C o n tro l
V O U T
G N D
C h ip E n a b le
C E
Rev 1.50
1
August 4, 2018
HT77xxA
Pin Assignment
S O T 8 9
T O 9 2
H T 7 7 x x A
1
2
S O T 2 3 -5
S O T 2 3
L X
5
V O U T
3
F r o n t V ie w
G N D
4
3
H T 7 7 x x A
G N D V O U T L X
B o tto m
T o p V ie w
1
2
3
G N D
V O U T
L X
G N D
V O U T
L X
T o p V ie w
7 x x A
T o p V ie w
7 x x A
1
2
1
2
3
G N D
L X
C E
V O U T
N C
G N D
L X
C E
V O U T
N C
V ie w
Pin Description
Pin No.
Pin Name
TO92
SOT89
SOT23
SOT23-5
¾
¾
¾
1
CE
2
2
3
2
VOUT
¾
¾
¾
3
NC
1
1
1
4
GND
3
3
2
5
LX
Description
Chip enable pin, high active
DC/DC converter output monitoring pin
No connection
Ground pin
Switching pin
Absolute Maximum Ratings
Supply Voltage ..............................VSS-0.3V to VSS+7V
Storage Temperature ............................-50°C to 125°C
Operating Temperature ...........................-40°C to 85°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed
in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
Thermal Information
Symbol
Parameter
qJA
Thermal Resistance
(Junction to Ambient)
(Assume no ambient airflow,
no heat sink)
PD
Package
Max.
Unit
SOT89
300
°C/W
TO92
300
°C/W
SOT23
330
°C/W
SOT23-5
320
°C/W
SOT89
0.33
W
TO92
0.33
W
SOT23
0.3
W
SOT23-5
0.31
W
Power Dissipation
Note: PD is measured at Ta= 25°C
Rev 1.50
2
August 4, 2018
HT77xxA
Electrical Characteristics
Symbol
VIN=VOUT´0.6; IOUT=10mA; Ta=25°C (Unless otherwise specified)
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VIN
Input Voltage
¾
¾
¾
6
V
VOUT
Output Voltage Tolerance
¾
-2.5
¾
2.5
%
VSTART
Start-up Voltage (Fig. 1)
VIN: 0®2V; IOUT=1mA
¾
0.7
0.9
V
VHOLD
Minimum Hold-on Voltage (Fig. 1) VIN: 2®0V; IOUT=1mA
¾
¾
0.7
V
IIN
No-load Input Current (Fig. 1)
IOUT=0mA
¾
13
26
mA
IDD
Supply Current (Fig. 2)
VS=VOUT+0.5V
Measured at VOUT pin
¾
5
10
mA
ISHDN
Shutdown Current
CE=GND
¾
0.5
1
mA
VIH
CE High Threshold
¾
2
¾
¾
V
VIL
CE Low Threshold
¾
¾
¾
0.4
V
ILEAK
LX Leakage Current (Fig. 3)
VS=VOUT+0.5V, VX=6V
Measured at the LX pin
¾
¾
0.9
mA
fOSC
Maximum Oscillator Frequency
(Fig. 3)
VS=VOUT´0.95, VX=6V
Measured at LX pin
¾
200
¾
kHz
DOSC
Oscillator Duty Cycle (Fig. 3)
VS=VOUT´0.95, VX=6V
Measured at LX pin
65
75
85
%
h
Efficiency
¾
85
¾
%
Note:
¾
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.
Test Circuit
1 N 5 8 1 7
1 0 0 m H
V
V
IN
4 7 m F
( T a n ta lu m )
Rev 1.50
L X
H T 7 7 X X A
S e r ie s
V O U T
O U T
2 2 m F
( T a n ta lu m )
V
S
V O U T
H T 7 7 X X A
S e r ie s
L X
V
S
V O U T
H T 7 7 X X A
S e r ie s
G N D
G N D
G N D
(F ig . 1 )
(F ig . 2 )
(F ig . 3 )
3
L X
V
1 0 0 W
X
August 4, 2018
HT77xxA
2 .8
2 .7
2 .7
2 .6
2 .6
2 .5
2 .5
2 .4
2 .4
2 .3
2 .3
0
9 0 %
5
IN
= 2 .0 V
V
IN
= 1 .8 V
0
V
5
0
V
5
IN
V
= 1 .2 V
= 1 .6 V
IN
8 5 %
E ffic ie n c y ( % )
O u tp u t V o lta g e ( V )
Typical Performance Characteristics
0
5
0
8 0 %
7 5 %
6 0 %
0
5 5 %
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
1 6 0
1 8 0
2 0 0
2 2 0
IN
= 1 .2 V
6 5 %
5
0
V
7 0 %
V
0
2 0
4 0
6 0
O u tp u t C u rre n t (m A )
8 0
1 0 0
1 2 0
IN
V
IN
= 2 .0 V
V
IN
= 1 .8 V
= 1 .6 V
1 4 0
1 6 0
1 8 0
2 0 0
2 2 0
O u tp u t C u rre n t (m A )
HT7727A Output Voltage v.s Output Current
HT7727A Efficiency v.s Output Current
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
3 6 0
3 6 0
3 1 0
V
IN
2 6 0
2 1 0
V
1 6 0
IN
V
= 1 .2 V
= 1 .8 V
R ip p le V o lta g e ( m V )
R ip p le V o lta g e ( m V )
3 1 0
= 1 .6 V
IN
V
1 1 0
IN
= 2 .0 V
2 6 0
2 1 0
= 1 .6 V
IN
V
1 1 0
6 0
1 0
V
1 6 0
IN
V
V
6 0
IN
IN
= 1 .8 V
= 1 .2 V
= 2 .0 V
1 0
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
1 6 0
1 8 0
2 0 0
0
2 2 0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
1 0 0
1 1 0
O u tp u t C u rre n t (m A )
O u tp u t C u rre n t (m A )
HT7727A Ripple Voltage v.s Output Current
HT7727A Ripple Voltage v.s Output Current
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
(CIN=47mF-Tantalum, L=100mH, COUT=22mF-Tantalum)
1
0 .9
1 0 0 %
H o ld - o n
8 0 %
0 .7
E ffic ie n c y ( % )
In p u t V o lta g e ( V )
0 .8
S ta rt-u p
0 .6
0 .5
0 .4
6 0 %
IO
4 0 %
IO
IO
2 0 %
0 .3
0 .2
0 %
0 .1
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 0
2 2
IO
-4 0
-1 5
1 0
3 5
U T
U T
U T
U T
= 1 0
= 3 0
= 5 0
= 1 0
6 0
m A
m A
m A
0 m A
8 5
T e m p e ra tu re (° C )
O u tp u t C u rre n t (m A )
HT7727A Efficiency v.s Temperature
HT7727A Start-up/Hold-on Voltage
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
Rev 1.50
4
August 4, 2018
HT77xxA
9 0 %
IN
= 2 .0 V
V
IN
= 1 .8 V
O u tp u t V o lta g e ( V )
2 .9 5
V
2 .8 8
V
2 .8 0
IN
V
= 1 .2 V
IN
= 1 .5 V
8 5 %
V
8 0 %
E ffic ie n c y ( % )
3 .0 3
2 .7 3
2 .6 5
2 .5 8
IN
= 1 .5 V
7 5 %
6 5 %
V
= 1 .2 V
IN
6 0 %
2 .5 0
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
1 6 0
1 8 0
2 0 0
V
IN
= 2 .0 V
V
IN
= 1 .8 V
7 0 %
5 5 %
2 2 0
0
2 0
4 0
6 0
O u tp u t C u rre n t (m A )
8 0
1 0 0
1 2 0
1 4 0
1 6 0
1 8 0
2 0 0
2 2 0
O u tp u t C u rre n t (m A )
HT7730A Output Voltage v.s Output Current
HT7730A Efficiency v.s Output Current
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
3 6 0
V
2 6 0
2 1 0
V
1 6 0
IN
IN
IN
= 1 .8 V
V
IN
= 2 .0 V
3 6 0
3 1 0
= 1 .5 V
R ip p le V o lta g e ( m V )
R ip p le V o lta g e ( m V )
3 1 0
V
= 1 .2 V
1 1 0
6 0
2 6 0
1 6 0
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
1 6 0
1 8 0
2 0 0
2 2 0
V
1 1 0
IN
= 1 .5 V
IN
= 1 .8 V
V
V
6 0
1 0
1 0
V
2 1 0
0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
IN
IN
= 1 .2 V
= 2 .0 V
1 0 0
1 1 0
O u tp u t C u rre n t (m A )
O u tp u t C u rre n t (m A )
HT7730A Ripple Voltage v.s Output Current
HT7730A Ripple Voltage v.s Output Current
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
(CIN=47mF-Tantalum, L=100mH, COUT=22mF-Tantalum)
1
S ta rt-u p
0 .9
H o ld - o n
In p u t V o lta g e ( V )
0 .8
0 .7
0 .6
0 .5
0 .4
0 .3
0 .2
0 .1
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 0
2 2
O u tp u t C u rre n t (m A )
HT7730A Start-up/Hold-on Voltage
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
Rev 1.50
5
August 4, 2018
HT77xxA
9 0 %
3 .4
3 .2
V
3 .1
V
3 .0
IN
IN
= 2 .0 V
V
IN
= 1 .8 V
8 5 %
8 0 %
= 1 .2 V
IN
V
= 1 .5 V
E ffic ie n c y ( % )
O u tp u t V o lta g e ( V )
3 .3
2 .9
2 .8
2 .7
7 5 %
V
IN
= 1 .2 V
V
7 0 %
IN
= 1 .5 V
V
IN
= 1 .8 V
1 4 0
1 6 0
V
6 5 %
= 2 .0 V
IN
6 0 %
2 .6
5 5 %
2 .5
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
1 6 0
1 8 0
2 0 0
2 2 0
0
2 0
4 0
6 0
O u tp u t C u rre n t (m A )
8 0
1 0 0
1 2 0
1 8 0
2 0 0
2 2 0
O u tp u t C u rre n t (m A )
HT7733A Output Voltage v.s Output Current
HT7733A Efficiency v.s Output Current
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
3 6 0
3 6 0
V
IN
= 1 .8 V
V
IN
= 2 .0 V
3 1 0
R ip p le V o lta g e ( m V )
R ip p le V o lta g e ( m V )
3 1 0
2 6 0
2 1 0
1 6 0
V
1 1 0
IN
= 1 .2 V
V
IN
= 1 .5 V
6 0
1 0
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
1 6 0
1 8 0
2 0 0
2 6 0
1 6 0
IN
V
IN
= 1 .5 V
= 1 .8 V
V
IN
= 1 .2 V
V
IN
= 2 .0 V
1 1 0
6 0
1 0
2 2 0
V
2 1 0
0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
1 0 0
1 1 0
O u tp u t C u rre n t (m A )
O u tp u t C u rre n t (m A )
HT7733A Ripple Voltage v.s Output Current
HT7733A Ripple Voltage v.s Output Current
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
(CIN=47mF-Tantalum, L=100mH, COUT=22mF-Tantalum)
1
S ta rt-u p
0 .9
H o ld - o n
In p u t V o lta g e ( V )
0 .8
0 .7
0 .6
0 .5
0 .4
0 .3
0 .2
0 .1
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 0
2 2
O u tp u t C u rre n t (m A )
HT7733A Start-up/Hold-on Voltage
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
Rev 1.50
6
August 4, 2018
5 .5
5 .2
4 .9
4 .6
4 .3
4 .0
3 .7
3 .4
3 .1
2 .8
2 .5
9 0 %
8 5 %
V
V
IN
V
= 1 .5 V
IN
V
= 2 .0 V
IN
= 3 .0 V
8 0 %
E ffic ie n c y ( % )
O u tp u t V o lta g e ( V )
HT77xxA
= 1 .2 V
IN
V
= 3 .0 V
IN
7 5 %
7 0 %
V
= 1 .2 V
IN
6 5 %
V
6 0 %
V
IN
= 2 .0 V
= 1 .5 V
IN
5 5 %
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
1 6 0
1 8 0
2 0 0
0
2 0
4 0
6 0
O u tp u t C u rre n t (m A )
8 0
1 0 0
1 2 0
1 4 0
1 6 0
1 8 0
2 0 0
2 2 0
O u tp u t C u rre n t (m A )
HT7750A Output Voltage v.s Output Current
HT7750A Efficiency v.s Output Current
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
3 6 0
3 6 0
2 6 0
2 1 0
V
IN
V
IN
= 2 .0 V
V
IN
= 3 .0 V
3 1 0
R ip p le V o lta g e ( m V )
R ip p le V o lta g e ( m V )
3 1 0
= 1 .5 V
1 6 0
1 1 0
V
IN
= 1 .2 V
2 6 0
2 1 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
1 6 0
1 8 0
2 0 0
= 2 .0 V
V
2 2 0
IN
V
V
6 0
1 0
1 0
2 0
IN
1 1 0
6 0
0
V
1 6 0
0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
IN
IN
= 1 .5 V
= 1 .2 V
= 3 .0 V
1 0 0
1 1 0
O u tp u t C u rre n t (m A )
O u tp u t C u rre n t (m A )
HT7750A Ripple Voltage v.s Output Current
HT7750A Ripple Voltage v.s Output Current
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
(CIN=47mF-Tantalum, L=100mH, COUT=22mF-Tantalum)
S ta rt-u p
1 .2
1 .1
1 0 0 %
H o ld - o n
8 0 %
E ffic ie n c y ( % )
In p u t V o lta g e ( V )
1
0 .9
0 .8
0 .7
0 .6
0 .5
0 .4
0 .3
0 .2
0 .1
6 0 %
IO U
IO U
IO U
IO U
IO U
IO U
4 0 %
2 0 %
0 %
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 0
-4 0
-1 5
1 0
3 5
T = 1
T = 3
T = 5
T = 1
T = 1
T = 2
6 0
0 m A
0 m A
0 m A
0 0 m A
5 0 m A
0 0 m A
8 5
T e m p e ra tu re (° C )
2 2
O u tp u t C u rre n t (m A )
HT7750A Efficiency v.s Temperature
HT7750A Start-up/Hold-on Voltage
(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)
Rev 1.50
7
August 4, 2018
HT77xxA
Application Circuits
Without CE Pin
S R 0 6 0 2 S e r ie s
A B C E le c tr o n ic s C o r p .
4 7 m H ~ 1 0 0 m H
V
1 N 5 8 1 7
V
IN
4 7 m F ( T a n ta lu m )
L X
H T 7 7 x x A
S e r ie s
V O U T
O U T
2 2 m F ( T a n ta lu m )
G N D
With CE Pin
S R 0 6 0 2 S e r ie s
A B C E le c tr o n ic s C o r p .
4 7 m H ~ 1 0 0 m H
V
1 N 5 8 1 7
V
IN
4 7 m F ( T a n ta lu m )
L X
H T 7 7 x x A
S e r ie s
C E
S R 0 6 0 2 S e r ie s
A B C E le c tr o n ic s C o r p .
4 7 m H ~ 1 0 0 m H
V
2 2 m F ( T a n ta lu m )
G N D
1 N 5 8 1 7
V
IN
4 7 m F ( T a n ta lu m )
L X
H T 7 7 x x A
S e r ie s
C E
Note:
V O U T
O U T
V O U T
O U T
2 2 m F ( T a n ta lu m )
G N D
For the 5-pin SOT23 package, when CE is pulled low, the internal blocks of the device, such as the reference
band gap, gain block, and all feedback and control circuitry will be switched off. The boost converter¢s output,
VOUT, will be at a value one Schottky diode voltage drop below the input voltage and the LX pin remains in a
high impedance condition. The output capacitor and load at VOUT determine the rate at which VOUT decays.
Rev 1.50
8
August 4, 2018
HT77xxA
Package Information
Note that the package information provided here is for consultation purposes only. As this information may be updated at regular intervals users are reminded to consult the Holtek website for the latest version of the package information.
Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be transferred to the relevant website page.
· Further Package Information (include Outline Dimensions, Product Tape and Reel Specifications)
· Packing Meterials Information
· Carton Information
Rev 1.50
9
August 4, 2018
HT77xxA
3-pin TO92 Outline Dimensions
A
B
D
C
E
F
G
H
Symbol
Nom.
Max.
A
0.173
0.180
0.205
B
0.170
¾
0.210
C
0.500
0.580
¾
D
¾
0.015 Typ
¾
E
¾
0.010 Typ
¾
F
¾
0.050 Typ
¾
G
¾
0.035 Typ
¾
H
0.125
0.142
0.165
Symbol
A
Rev 1.50
Dimensions in inch
Min.
Dimensions in mm
Min.
Nom.
Max.
4.39
4.57
5.21
B
4.32
¾
5.33
C
12.70
14.73
¾
D
¾
0.38 Typ
¾
E
¾
2.54 Typ
¾
F
¾
1.27 Typ
¾
G
¾
0.89 Typ
¾
H
3.18
3.61
4.19
10
August 4, 2018
HT77xxA
3-pin SOT89 Outline Dimensions
I
A
J
B
C
E
D
G
F
Symbol
Dimensions in inch
Min.
Nom.
Max.
A
0.173
¾
0.181
B
0.053
¾
0.072
C
0.090
¾
0.102
D
0.035
¾
0.047
E
0.155
¾
0.167
F
0.014
¾
0.019
G
0.017
¾
0.022
H
¾
0.059 BSC
¾
I
0.055
¾
0.063
J
0.014
¾
0.017
Symbol
A
Rev 1.50
H
Dimensions in mm
Min.
Nom.
Max.
4.40
¾
4.60
B
1.35
¾
1.83
C
2.29
¾
2.60
D
0.89
¾
1.20
E
3.94
¾
4.25
F
0.36
¾
0.48
G
0.44
¾
0.56
H
¾
1.50 BSC
¾
I
1.40
¾
1.60
J
0.35
¾
0.44
11
August 4, 2018
HT77xxA
3-pin SOT23 Outline Dimensions
D
C
L
H
E
q
e
A
A 2
b
Symbol
A
Dimensions in inch
Min.
Nom.
Max.
¾
¾
0.057
A1
¾
¾
0.006
A2
0.035
0.045
0.051
b
0.012
¾
0.020
C
0.003
¾
0.009
D
¾
0.114 BSC
¾
E
¾
0.063 BSC
¾
e
¾
0.037 BSC
¾
H
¾
0.075 BSC
¾
L
¾
0.110 BSC
¾
L1
¾
0.024 BSC
¾
q
0°
¾
8°
Symbol
A
Rev 1.50
A 1
Dimensions in mm
Min.
Nom.
Max.
¾
¾
1.45
A1
¾
¾
0.15
A2
0.90
1.15
1.30
b
0.30
¾
0.50
C
0.08
¾
0.22
D
¾
2.90 BSC
¾
E
¾
1.60 BSC
¾
e
¾
0.95 BSC
¾
H
¾
1.90 BSC
¾
L
¾
2.80 BSC
¾
L1
¾
0.60 BSC
¾
q
0°
¾
8°
12
August 4, 2018
HT77xxA
5-pin SOT23 Outline Dimensions
Symbol
A
Min.
Nom.
Max.
¾
¾
0.057
A1
¾
¾
0.006
A2
0.035
0.045
0.051
b
0.012
¾
0.020
C
0.003
¾
0.009
D
¾
0.114 BSC
¾
E
¾
0.063 BSC
¾
e
¾
0.037 BSC
¾
H
¾
0.075 BSC
¾
L
¾
0.110 BSC
¾
L1
¾
0.024 BSC
¾
q
0°
¾
8°
Symbol
A
Rev 1.50
Dimensions in inch
Dimensions in mm
Min.
Nom.
Max.
¾
¾
1.45
A1
¾
¾
0.15
A2
0.90
1.15
1.30
b
0.30
¾
0.50
C
0.08
¾
0.22
D
¾
2.90 BSC
¾
E
¾
1.60 BSC
¾
e
¾
0.95 BSC
¾
H
¾
1.90 BSC
¾
L
¾
2.80 BSC
¾
L1
¾
0.60 BSC
¾
q
0°
¾
8°
13
August 4, 2018
HT77xxA
Copyright Ó 2018 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and
Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a
risk to human life due to malfunction or otherwise. Holtek¢s products are not authorized for use
as critical components in life support devices or systems. Holtek reserves the right to alter its
products without prior notification. For the most up-to-date information, please visit our web
site at http://www.holtek.com.tw.
Rev 1.50
14
August 4, 2018
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