Holtek HT7718 Pfm asynchronous step-up dc to dc converter (100ma) Datasheet

HT77xx
PFM Asynchronous Step-up DC to DC Converter (100mA)
Features
· Low start-up voltage: 0.7V (Typ.), 0.9V (Max.)
· Output current up to 100mA
· High efficiency: 85% (Typ.), VOUT³2.7V
· Ultra low supply current IDD2: 4mA (Typ.)
· High output voltage accuracy: ±2.5%
· Low ripple and low noise
· Output voltage: 1.8V, 2.2V, 2.7V, 3.0V, 3.3V, 3.7V,
· Low shutdown current: 0.5mA (Typ.)
5.0V
· TO92, SOT89, SOT23 and SOT23-5 package
Applications
· Palmtops/PDAs
· Cameras/Camcorders
· Portable communicators/Smartphones
· Battery-powered equipment
General Description
The HT77xx 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 TO92, SOT89, SOT23 and SOT23-5
packages. For SOT23-5 package, it also build-in a chip
enable function to reduce power consumption during
shutdown mode.
The HT77xx 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 1.8V, 2.2V,
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.
Selection Table
Note:
Part No.
Output Voltage
HT7718
1.8V
HT7722
2.2V
HT7727
2.7V
HT7730
3.0V
HT7733
3.3V
HT7737
3.7V
HT7750
5.0V
Package
Marking
TO92
SOT89
SOT23
SOT23-5
HT77xx (for TO92)
HT77xx (for SOT89)
77xx (for SOT23)
77xx (for SOT23-5)
²XX² stands for output voltages.
Rev 2.00
1
June 25, 2016
HT77xx
Block Diagram
V re f
V O U T
L X
B u ffe r
P F M
C o n tro l
O S C
1 1 5 k H z
G N D
C h ip E n a b le
C E
Pin Assignment
S O T 8 9
T O 9 2
2
L X
5
V O U T
3
F r o n t V ie w
1
S O T 2 3 -5
S O T 2 3
G N D
4
3
T o p V ie w
T o p V ie w
G N D V O U T L X
B o tto m
1
2
3
G N D
V O U T
L X
G N D
V O U T
L X
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.
Rev 2.00
2
June 25, 2016
HT77xx
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
Electrical Characteristics
Symbol
Parameter
VIN=VOUT´0.6; IOUT=10mA; Ta=25°C (Unless otherwise specified)
Test Conditions
Min.
Typ.
Max.
Unit
VIN
Input Voltage
¾
¾
¾
6
V
DVOUT
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)
¾
10
20
mA
VOUT=1.8V
¾
35
50
VOUT=2.2V
¾
37
55
VOUT=2.7V
¾
40
60
VOUT=3.0V
¾
45
68
VOUT=3.3V
¾
55
81
VOUT=3.7V
¾
64
85
VOUT=5.0V
¾
85
134
IDD1
Supply Current 1 (Fig. 2)
IOUT=0mA
VS=VOUT´0.95
Measured at VOUT pin
mA
IDD2
Supply Current 2 (Fig. 2)
VS=VOUT+0.5V
Measured at VOUT pin
¾
4
7
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
Measured at LX pin
¾
115
¾
kHz
DOSC
Oscillator Duty Cycle (Fig. 3)
VS=VOUT´0.95
Measured at LX pin
65
75
85
%
h
VOUT£2.2V
¾
80
Efficiency
¾
VOUT³2.7V
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 2.00
3
June 25, 2016
HT77xx
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 )
L X
1 0 0 m F
( T a n ta lu m )
V O U T
H T 7 7 X X
S e r ie s
O U T
V
V O U T
S
V
L X
H T 7 7 X X
S e r ie s
V O U T
S
L X
H T 7 7 X X
S e r ie s
G N D
G N D
G N D
(F ig . 1 )
(F ig . 2 )
(F ig . 3 )
1 0 0 W
V
X
Typical Performance Characteristics
1 .9 0
1 .1
1 .0
S ta rt-u p
0 .9
0 .8
1 .8 0
V
V
1 .7 5
IN
= 1 .6 V
V
= 1 .0 8 V
IN
V
IN
In p u t V o lta g e ( V )
O u tp u t V o lta g e ( V )
1 .8 5
= 1 .4 V
IN
= 1 .2 V
1 .7 0
0 .7
0 .6
0 .5
0 .4
0 .3
1 .6 5
0 .2
1 .6 0
0 .0
H o ld - o n
0 .1
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 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 )
HT7718 Start-Up& Hold-On Voltage
HT7718 Output Voltage v.s Output Current
9 0 %
1 .8 2 0
8 5 %
V
IN
1 .8 0 8
= 1 .6 V
Io u t= 1 0 m A
O u tp u t V o lta g e ( V )
E ffic ie n c y ( % )
8 0 %
7 5 %
V
7 0 %
V
IN
IN
= 1 .4 V
= 1 .0 8 V
6 5 %
V
6 0 %
IN
1 .7 9 6
Io u t= 1 m A
1 .7 8 4
1 .7 7 2
= 1 .2 V
1 .7 6 0
5 5 %
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
-1 5
1 0
3 5
6 0
8 5
T e m p e ra tu re (° C )
O u tp u t C u rre n t (m A )
HT7718 Temperature v.s Output Voltage
HT7718 Efficiency v.s Output Current
Rev 2.00
-4 0
4
June 25, 2016
HT77xx
2 .2 2
2 .8 0
V
2 .1 8
V
2 .1 6
IN
V
IN
IN
2 .7 5
= 2 .0 V
= 1 .8 V
O u tp u t V o lta g e ( V )
O u tp u t V o lta g e ( V )
2 .2 0
= 1 .5 V
2 .1 4
V
2 .1 2
= 1 .2 V
IN
V
2 .7 0
V
2 .6 5
V
= 1 .2 V
= 2 .0 V
V IN = 1 . 8 V
= 1 .6 V
IN
2 .6 0
2 .5 5
2 .1 0
2 .0 8
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
2 .5 0
1 4 0
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 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 )
HT7722 Output Voltage v.s Output Current
HT7727 Output Voltage v.s Output Current
9 0
9 0
V
8 0
V
7 0
V
IN
= 2 .0 V
IN
8 5
= 1 .8 V
IN
V
= 1 .5 V
IN
= 2 .0 V
8 0
V
5 0
IN
E ffic ie n c y ( % )
6 0
E ffic ie n c y ( % )
IN
IN
= 1 .2 V
4 0
V
7 5
V
IN
IN
= 1 .8 V
= 1 .6 V
7 0
V
3 0
IN
= 1 .2 V
6 5
2 0
6 0
1 0
0
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
5 5
1 4 0
0
2 0
4 0
6 0
HT7722 Efficiency v.s Output Current
1 2 0
1 4 0
1 .0
0 .9
1 .0
S ta rt u p
0 .8
S ta rt u p
0 .8
In p u t V o lta g e ( V )
In p u t V o lta g e ( V )
1 0 0
HT7727 Efficiency v.s Output Current
1 .2
0 .6
H o ld o n
0 .4
0 .7
0 .6
0 .5
H o ld o n
0 .4
0 .3
0 .2
0 .2
0 .0
8 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 )
0 .1
0 .0
0
2
4
6
8
1 0
1 2
O u tp u t C u rre n t (m A )
1 4
1 6
1 8
2 0
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
O u tp u t C u rre n t (m A )
HT7722 Start-Up& Hold-On Voltage
HT7727 Start-Up& Hold-On Voltage
2 .7 1 0
Io u t= 1 0 m A
O u tp u t V o lta g e ( V )
2 .6 9 8
Io u t= 1 m A
2 .6 8 6
2 .6 7 4
2 .6 6 2
2 .6 5 0
-4 0
-1 5
1 0
3 5
6 0
8 5
T e m p e ra tu re (° C )
HT7727 Temperature v.s Output Voltage
Rev 2.00
5
June 25, 2016
HT77xx
3 .4
3 .0 2
3 .0 0
V
2 .9 8
V
2 .9 4
IN
V
= 1 .2 V
IN
IN
= 1 .8 V
V
3 .2
= 1 .5 V
2 .9 2
2 .9 0
2 .8 8
V
V
IN
= 1 .8 V
= 1 .5 V
2 .7
2 .6
2 .8 0
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
2 .5
1 4 0
0
2 0
4 0
6 0
8 0
1 0 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 )
HT7730 Output Voltage v.s Output Current
1 2 0
1 4 0
HT7733 Output Voltage v.s Output Current
9 0
8 5
V
8 0
V
7 5
V
IN
= 2 .0 V
IN
= 1 .8 V
IN
8 5
= 1 .5 V
7 0
6 5
V
IN
V
8 0
E ffic ie n c y ( % )
E ffic ie n c y ( % )
IN
2 .8
2 .8 2
= 1 .2 V
6 0
V
7 5
V
7 0
V
= 1 .2 V
IN
IN
IN
IN
= 2 .0 V
= 1 .8 V
= 1 .5 V
6 5
6 0
5 5
5 5
0
2 0
4 0
6 0
8 0
1 0 0
O u tp u t C u rre n t (m A )
1 2 0
5 0
1 4 0
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 0
O u tp u t C u rre n t (m A )
HT7730 Efficiency v.s Output Current
HT7733 Efficiency v.s Output Current
1 .1
1 .0
1 .0
S ta rt u p
0 .9
S ta rt u p
0 .9
0 .8
0 .8
0 .7
In p u t V o lta g e ( V )
In p u t V o lta g e ( V )
V
2 .9
2 .8 4
0 .6
0 .5
H o ld o n
0 .4
0 .7
0 .6
0 .5
0 .4
0 .3
0 .3
0 .2
0 .2
0 .1
0 .1
0 .0
= 1 .2 V
3 .0
2 .8 6
5 0
IN
= 2 .0 V
IN
3 .1
O u tp u t V o lta g e ( V )
O u tp u t V o lta g e ( V )
2 .9 6
3 .3
= 2 .0 V
IN
V
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
0 .0
2 0
H o ld o n
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 0
U T
= 1 m A
O u tp u t C u rre n t (m A )
O u tp u t C u rre n t (m A )
HT7730 Start-Up& Hold-On Voltage
HT7733 Start-Up& Hold-On Voltage
3 .0 0 0
3 .3 2 0
Io u t= 1 0 m A
3 .3 1 2
Io u t= 1 m A
O u tp u t V o lta g e ( V )
O u tp u t V o lta g e ( V )
2 .9 9 8
2 .9 9 6
2 .9 9 4
2 .9 9 2
2 .9 9 0
IO
U T
= 1 0 m A
IO
3 .3 0 4
3 .2 9 6
3 .2 8 8
-4 0
-1 5
1 0
3 5
6 0
3 .2 8 0
8 5
T e m p e ra tu re (° C )
-1 5
1 0
3 5
6 0
8 5
T e m p e ra tu re (° C )
HT7730 Temperature v.s Output Voltage
Rev 2.00
-4 0
HT7733 Temperature v.s Output Voltage
6
June 25, 2016
HT77xx
4 .0
5 .5
3 .9
V
3 .7
3 .6
V
O u tp u t V o lta g e ( V )
3 .5
IN
V
= 1 .5 V
IN
= 2 .2 V
V
3 .2
IN
IN
= 3 .0 V
V
4 .5
3 .4
3 .3
V
5 .0
= 3 .0 V
IN
O u tp u t V o lta g e ( V )
3 .8
= 1 .2 V
3 .1
3 .0
V
4 .0
V
3 .0
IN
= 1 .2 V
2 .5
2 .8
2 .7
2 .0
2 .6
2 .5
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 .5
1 4 0
0
2 0
4 0
O u tp u t C u rre n t (m A )
6 0
8 0
1 0 0
1 0 0
V
8 5
8 0
IN
= 3 .0 V
IN
= 2 .2 V
IN
= 1 .5 V
V
9 0
V
V
E ffic ie n c y ( % )
E ffic ie n c y ( % )
7 0
6 5
V
6 0
= 1 .2 V
IN
V
7 0
6 0
V
IN
IN
= 2 .0 V
V
IN
= 1 .5 V
= 1 .2 V
5 0
5 5
4 0
5 0
3 0
4 5
2 0
0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
0
1 4 0
2 0
4 0
6 0
8 0
1 0 0
1 2 0
1 4 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 )
HT7750 Efficiency v.s Output Current
HT7737 Efficiency v.s Output Current
1 .8
1 .1
1 .6
1 .0
S ta rt u p
0 .9
1 .4
In p u t V o lta g e ( V )
0 .8
In p u t V o lta g e ( V )
= 3 .0 V
IN
8 0
7 5
0 .7
0 .6
0 .5
H o ld o n
0 .4
0 .3
1 .2
S ta rt u p
1 .0
0 .8
0 .6
0 .4
0 .2
H o ld o n
0 .2
0 .1
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
0 .0
2 0
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 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 )
HT7737 Start-Up& Hold-On Voltage
HT7750 Start-Up& Hold-On Voltage
3 .7 4 0
5 .0 0
3 .7 2 8
4 .9 9
Io u t= 1 0 m A
Io u t= 1 m A
Io u t= 1 m A
Io u t= 1 0 m A
O u tp u t V o lta g e ( V )
O u tp u t V o lta g e ( V )
1 4 0
HT7750 Output Voltage v.s Output Current
9 0
4 0
1 2 0
O u tp u t C u rre n t (m A )
HT7737 Output Voltage v.s Output Current
3 .7 1 6
3 .7 0 4
3 .6 9 2
3 .6 8 0
= 2 .0 V
3 .5
2 .9
0 .0
IN
= 1 .5 V
IN
4 .9 8
4 .9 7
4 .9 6
-4 0
-1 5
1 0
3 5
6 0
4 .9 5
8 5
T e m p e ra tu re (° C )
-1 5
1 0
3 5
6 0
8 5
T e m p e ra tu re (° C )
HT7737 Temperature v.s Output Voltage
Rev 2.00
-4 0
HT7750 Temperature v.s Output Voltage
7
June 25, 2016
HT77xx
HT7730 Load Transient Response
(L=100mH, COUT=100mF, VIN=1.8V)
HT7718 Load Transient Response
(L=100mH, COUT=100mF, VIN=1.08V)
HT7733 Load Transient Response
(L=100mH, COUT=100mF, VIN=1.98V)
HT7722 Load Transient Response
(L=100mH, COUT=100mF, VIN=1.08V)
HT7727 Load Transient Response
(L=100mH, COUT=100mF, VIN=1.62V)
Rev 2.00
HT7737 Load Transient Response
(L=100mH, COUT=100mF, VIN=2.22V)
8
June 25, 2016
HT77xx
V
O U T
5 0 m V /d iv
V
2 0 m V /d iv
O U T
5 0 m A
V
L o a d S te p
IN
1 V /d iv
2 0 m A /d iv
HT7750 Load Transient Response
(L=100mH, COUT=100mF, VIN=3V)
HT7733 Line Transient Response
(L=100mH, COUT=100mF)
V
2 0 m V /d iv
O U T
V
IN
1 V /d iv
HT7722 Line Transient Response
(L=100mH, COUT=100mF)
Rev 2.00
HT7750 Line Transient Response
(L=100mH, COUT=100mF)
9
June 25, 2016
HT77xx
Application Circuits
Without CE Pin
G S 5 4 -1 0 1 K
G a n g S o n g E le c tr o n ic s C o ., L td .
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
S e r ie s
V O U T
O U T
1 0 0 m F ( T a n ta lu m )
G N D
With CE Pin
G S 5 4 -1 0 1 K
G a n g S o n g E le c tr o n ic s C o ., L td .
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
S e r ie s
C E
G S 5 4 -1 0 1 K
G a n g S o n g E le c tr o n ic s C o ., L td .
1 0 0 m H
V
1 0 0 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
S e r ie s
C E
Note:
V O U T
O U T
V O U T
O U T
1 0 0 m F ( T a n ta lu m )
G N D
For the SOT23-5 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 2.00
10
June 25, 2016
HT77xx
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/Carton Information.
Additional supplementary information with regard to packaging is listed below. Click on the relevant
section to be transferred to the relevant website page.
• Package Information (include Outline Dimensions, Product Tape and Reel Specifications)
• The Operation Instruction of Packing Materials
• Carton information
Rev 2.00
11
June 25, 2016
HT77xx
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 2.00
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
12
June 25, 2016
HT77xx
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 2.00
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
13
June 25, 2016
HT77xx
3-pin SOT23-3 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 2.00
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°
14
June 25, 2016
HT77xx
5-pin SOT23-5 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 2.00
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°
15
June 25, 2016
HT77xx
Copyright Ó 2016 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 2.00
17
June 25, 2016