ETC HT77XXS

盛群半导体推出 HT77xxS 同步整流直流升压 IC，拓展 Power 直流升压 DC-DC PFM
03/05/2012
延续广受好评的直流升压IC HT77xx，盛群半导体新推出同步整流直流
升压IC HT77xxS (S: synchronous)。
采用精心调整过的CMOS制程，HT77xxS的启动电压只需 0.7V，静态工作电流亦只需要 4uA。此特
性适合在单颗的碱性、镍氢、镍镉及锂离子电池的产品应用上。并使用PFM同步整流的设计架构，直
流转换效率高达 93%，能够延长可携式产品电池供电时间。另HT77xxS具备有低噪声的特性，可以
满足RF模块应用上的电源质量。
HT77xxS由于是同步升压的IC，在应用电路的组件方面，会较之前发表过的HT77xx节省了一个萧特
基二极管。因此，整个应用电路上只需三个组件即可—10uF陶瓷积层式的输入电容，10uF陶瓷积层
式的输出电容及 10uH绕线式或是新式的功率型积层式电感。
HT77xxS所提供的输出电流为 100mA以上，输出电压档次分别为 1.8V、2.2V、2.7V、3.0V、3.3V、
3.7V、5.0V；封装形式有SOT23、SOT23-5、SOT89、TO92，封装脚位与HT77xx相同，是轻薄短小
和可携式产品最佳选择的直流升压IC。
HT77xxS
100mA PFM Synchronous
Step-up DC/DC Converter
Features
General Description
• Low start-up voltage: 0.7V (Typ.)
The HT77xxS devices are a high efficiency PFM synchronous step-up DC-DC converter series which are
designed to operate with both wire wound chip power
inductors and also with multi-layered chip power
inductors. The device series have the advantages of
extremely low start-up voltage as well as high output
voltage accuracy. Being manufactured using CMOS
technology ensures ultra low supply current. Because
of their higher operating frequency, up to 500 kHz,
the devices have the benefits of requiring smaller outline type lower value external inductors and capacitors. The higher operating frequency also offers the
advantages of much reduced audio frequency noise.
The devices 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.
• High efficiency: 1.8V ≤ VOUT ≤ 2.2V upper 80%,
2.7V ≤ VOUT ≤ 5.0V upper 85% (Typ.)
• High output voltage accuracy: ±2.5%
• Output voltage: 1.8V, 2.2V, 2.7V, 3.0V, 3.3V, 3.7V,
5.0V
• Output current up to 100mA
• Ultra low supply current IDD: 4μA (Typ.)
• Low ripple and low noise
• Low shutdown current: 0.1μA (Typ.)
• TO92, SOT89, SOT23 and SOT23-5 package
Applications
• Palmtops/PDAs
The HT77xxS devices include an internal oscillator,
PFM control circuit, driver transistor, reference voltage unit and a high speed comparator. They employ
pulse frequency modulation techniques, to obtain
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 types, they also include an internal
chip enable function to reduce power consumption
when in the shutdown mode.
• Portable communicators/Smartphones
• Cameras/Camcorders
• Battery-powered equipment
Selection Table
Rev. 1.00
Part No.
Output Voltage
HT7718S
1.8V
HT7722S
2.2V
HT7727S
2.7V
HT7730S
3.0V
HT7733S
3.3V
HT7737S
3.7V
HT7750S
5.0V
1
Tolerance
Package
±2.5%
TO92
SOT89
SOT23
SOT23-5
February 22, 2012
HT77xxS
Block Diagram
V re f
V O U T
P F M
V O U T
C o n tro l
B u ffe r
L X
O S C
C h ip E n a b le
G N D
C E
Pin Assignment
V O U T
3
F r o n t V ie w
1
2
L X
5
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
—
—
—
1
CE
2
2
3
2
VOUT
—
—
—
3
NC
1
1
1
4
GND
3
3
2
5
LX
Rev. 1.00
2
Description
Chip enable pin, high active
DC/DC converter output monitoring pin
No connection
Ground pin
Switching pin
February 22, 2012
HT77xxS
Absolute Maximum Ratings
Maximum Input Supply Voltage........................... 6.5V
Storage Temperature ........................... -50°C to 125°C
Ambient Temperature Range ................ -40°C to 85°C
Note: These are stress ratings only. Stresses exceeding the range specified under "Absolute Maximum Ratings"
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.
Electrical Characteristics
Symbol
Parameter
VIN
Input Voltage
ΔVOUT
Output Voltage Tolerance
VSTART
Starting Voltage
VHOLD
Voltage Hold
IDD
Ta= 25°C; VIN= VOUT×0.6; IOUT= 10mA; unless otherwise specified
Test Conditions
Min.
Typ.
Max.
Unit
—
—
6.0
V
-2.5
—
+2.5
%
VIN: 0 to 2V, IOUT= 1mA
—
0.7
0.9
V
VIN: 2 to 0V, IOUT= 1mA
—
0.7
—
V
Supply Current
VS= VOUT+0.5V, Measured at VOUT
Pin
—
4
7
μA
ISHDN
Shutdown Current
CE= GND
—
0.1
1.0
μA
VIH
CE High Threshold
1.5
—
—
V
VIL
CE Low Threshold
—
—
0.4
V
ILEAK
LX Leakage Current
—
0.05
1
μA
FOSC
Oscillator Frequency
DOSC
Oscillator Duty Cycle
η
Efficiency
—
—
VS= 5.5V, VX= 4V
Measurement at the LX pin
VS= VOUT×0.95
Measurement at the LX pin
—
500
—
kHz
70
80
—
%
1.8V≤ VOUT≤ 2.2V
—
80
—
%
2.7V≤ VOUT≤ 5.0V
—
85
—
%
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. 1.00
3
February 22, 2012
HT77xxS
Application Circuits
Without CE Pin
L
VIN
10μH
LX
VOUT
VOUT
HT77xxS
CIN
10μF
COUT
10μF
GND
With CE Pin
L
VIN
10μH
CIN
10μF
VOUT
LX
VOUT
HT77xxS
CE
COUT
10μF
GND
L
VIN
10μH
LX
VOUT
VOUT
HT77xxS
CE
CIN
10μF
VOUT
GND
COUT
10μF
List of Components
Component
Reference
Part Number
Manufacturer
CIN, COUT
GJ831CR61E106KE83L
Murata
L
SR0302100MLB
ABC Taiwan Electronics Corp.
10μH, RDC= 0.25Ω.
Wire Wound Chip Power Inductor
L
LBC3225T100MR
TAIYO YUDEN
10μH, RDC= 0.133Ω.
Multi-layered Chip Power Inductor
Rev. 1.00
4
Value
10μF, 25V. X5R Ceramic
February 22, 2012
HT77xxS
Functional Description
Application Information
The HT77xxS is a constant on time synchronous step-up
converter, which uses a pulse frequency modulation
(PFM) controller scheme. The PFM control scheme is
inherently stable. The required input/output capacitor
and inductor selections will not create situations of
instability.
Inductor Selection
Selecting a suitable inductor is an important consideration as it is usually a compromise situation between
the output current requirements, the inductor saturation
limit and the acceptable output voltage ripple. Lower
values of inductor values can provide higher output
currents but will suffer from higher ripple voltages
and reduced efficiencies. Higher inductor values can
provide reduced output ripple voltages and better efficiencies, but will be limited in their output current
capabilities. For all inductors it must be noted however
that lower core losses and lower DC resistance values
will always provide higher efficiencies.
The device includes a fully integrated synchronous
rectifier which reduces costs (includes reduce L and C
sizes, eliminates Schottky diode cost etc.) and board
area. A true load disconnect function ensures that the
device is completely shutdown.
Low Voltage Start-up
The devices have a very low start up voltage down to
0.7V. When power is first applied, the synchronous
switch will be initially off but energy will be transferred to the load through its intrinsic body diode.
The peak inductor current can be calculated using the
following equation:
I L ( PEAK ) =
Shutdown
Where
During normal device operation, the EN pin should be
either high or connected to the VOUT pin or the VIN
power source. When the device is in the shutdown
mode, that is when the EN pin is pulled low, the internal circuitry will be switched off. During shutdown,
the PMOS power transistor will be switched off thus
placing the output into a floating condition.
VIN = Input Voltage
VOUT = Output Voltage
IO = Output Current
η = Efficiency
L = Inductor
Capacitor Selection
Synchronous Rectification
As the output capacitor selected affects both efficiency and output ripple voltage, it must be chosen with
care to achieve best results from the converter. Output
voltage ripple is the product of the peak inductor current
and the output capacitor equivalent series resistance
or ESR for short. It is important that low ESR value
capacitors are used to achieve optimum performance.
One method to achieve low ESR values is to connect
two or more filter capacitors in parallel. The capacitors
values and rated voltages are only suggested values.
A dead time exists between the N channel and P channel MOSFET switching operations. In synchronous
rectification, the P channel is replaced by a Schottky
diode. Here the P channel switch must be completely
off before the N channel switch is switched on. After
each cycle, a 30ns delay time is inserted to ensure the
N channel switch is completely off before the P channel
switch is switched on to maintain a high efficiency
over a wide input voltage and output power range.
Rev. 1.00
VOUT × IO VIN × (VOUT − VIN )
+
VIN × η
2 × VOUT × L
5
February 22, 2012
HT77xxS
Layout Considerations
Circuit board layout is a very important consideration for switching regulators if they are to function properly.
Poor circuit layout may result in related noise problems. In order to minimise EMI and switching noise, note the
following guidelines:
• All tracks should be as wide as possible.
• The input and output capacitors should be placed as close as possible to the VIN, VOUT and GND pins.
• A full ground plane is always helpful for better EMI performance.
Rev. 1.00
Top Layer
Bottom Layer
Top Layer
Bottom Layer
Top Layer
Bottom Layer
Top Layer
Bottom Layer
6
February 22, 2012
HT77xxS
Typical Performance Characteristics
(L use wire wound chip power inductor)
HT7750S
6
100%
80%
Efficiency (%)
Output Voltage (V)
5.2
4.4
3.6
VIN=3.0V
60%
40%
VIN=3.0V
VIN=2.0V
VIN=2.0V
VIN=1.5V
2.8
20%
VIN=1.2V
VIN=1.5V
VIN=1.2V
0%
2
0
50
100
150
200
Output Current (mA)
250
0
300
Fig 1. HT7750S Output Voltage vs. Output Current
100
150
200
Output Current (mA)
250
300
Fig 2. HT7750S Efficiency vs. Output Current
1.2
250
200
Ripple Voltage (mV)
0.9
Input Voltage (V)
50
Start-up
Hold-on
0.6
0.3
150
VIN=3.0V
VIN=2.0V
100
VIN=1.5V
VIN=1.2V
50
0
0
0
5
10
15
0
20
50
100
150
200
250
300
Output Current (mA)
Output Current (mA)
Fig 3. HT7750S Start-up & Hold-on Voltage
Fig 4. HT7750S Ripple Voltage vs. Output Current
Fig 5. HT7750S Load Transient Response
Fig 6. HT7750S Line Transient Response
(L= 10μH, CIN= COUT= 10μF, VIN= 3.0V)
(L= 10μH, CIN= COUT= 10μF, VIN= 3.0V)
Rev. 1.00
7
February 22, 2012
HT77xxS
82
81
1.1
Oscillator Duty Cycle (%)
Output Voltage Tolerance (%)
2
HT7750S NO.1
0.2
HT7750S NO.2
-0.7
-1.6
80
79
78
HT7750S NO.1
HT7750S NO.2
77
76
-2.5
-40
-15
10
35
60
-40
85
-15
10
35
60
85
Temperature (℃)
Temperature (℃)
Fig 7. HT7750S Output Voltage Tolerance vs.
Fig 8. HT7750S Oscillator Duty Cycle vs.
Temperature
Temperature
Oscillator Frequency (KHz)
750
675
600
HT7750S NO.1
HT7750S NO.2
525
450
375
300
-40
-15
10
35
60
85
Temperature (℃)
Fig 9. HT7750S Oscillator Frequency vs.
Fig 10. HT7750S LX Leakage Current vs.
Temperature
Temperature
Rev. 1.00
8
February 22, 2012
HT77xxS
4
100%
3.7
80%
Efficiency (%)
Output Voltage (V)
HT7737S
3.4
3.1
60%
40%
VIN=2.0V
VIN=2.0V
VIN=1.8V
2.8
VIN=1.8V
20%
VIN=1.5V
VIN=1.5V
VIN=1.2V
VIN=1.2V
0%
2.5
0
50
100
150
0
200
50
Output Current (mA)
150
200
Fig 12. HT7737S Efficiency vs. Output Current
Fig 11. HT7737S Output Voltage vs. Output Current
200
1.2
150
Ripple Voltage (mV)
0.9
Input Voltage (V)
100
Output Current (mA)
Start-up
Hold-on
0.6
100
VIN=2.0V
50
0.3
VIN=1.8V
VIN=1.5V
VIN=1.2V
0
0
0
5
10
15
0
20
50
100
150
200
Output Current (mA)
Output Current (mA)
Fig 13. HT7737S Start-up & Hold-on Voltage
Fig 14. HT7737S Ripple Voltage vs. Output Current
Fig 15. HT7737S Load Transient Response
Fig 16. HT7737S Line Transient Response
(L= 10μH, CIN= COUT= 10μF, VIN= 2.22V)
(L= 10μH, CIN= COUT= 10μF, VIN= 2.22V)
Rev. 1.00
9
February 22, 2012
HT77xxS
HT7733S
100%
3.5
80%
Efficiency (%)
Output Voltage (V)
3.3
3.1
60%
40%
VIN=2.0V
VIN=2.0V
2.9
VIN=1.8V
VIN=1.8V
20%
VIN=1.5V
VIN=1.5V
VIN=1.2V
VIN=1.2V
2.7
0%
0
50
100
150
200
0
50
100
150
200
Output Current (mA)
Output Current (mA)
Fig 17. HT7733S Output Voltage vs. Output Current
Fig 18. HT7733S Efficiency vs. Output Current
600
1.2
500
Ripple Voltage (mV)
Input Voltage (V)
0.9
Start-up
Hold-on
0.6
400
300
200
VIN=2.0V
VIN=1.8V
0.3
100
VIN=1.5V
VIN=1.2V
0
0
0
5
10
15
0
20
50
100
150
200
Output Current (mA)
Output Current (mA)
Fig 19. HT7733S Start-up & Hold-on Voltage
Fig 20. HT7733S Ripple Voltage vs. Output Current
Fig 21. HT7733S Load Transient Response
Fig 22. HT7733S Line Transient Response
(L=10μH, CIN=COUT=10μF, VIN=1.98V)
(L=10μH, CIN=COUT=10μF, VIN=1.98V)
Rev. 1.00
10
February 22, 2012
HT77xxS
HT7730S
100%
3.3
80%
Efficiency (%)
Output Voltage (V)
3.1
2.9
60%
40%
VIN=2.0V
VIN=2.0V
2.7
VIN=1.8V
VIN=1.8V
20%
VIN=1.5V
VIN=1.5V
VIN=1.2V
VIN=1.2V
0%
2.5
0
50
100
150
200
0
250
50
100
150
200
250
Output Current (mA)
Output Current (mA)
Fig 23. HT7730S Output Voltage vs. Output Current
Fig 24. HT7730S Efficiency vs. Output Current
1.2
600
500
Ripple Voltage (mV)
Input Voltage (V)
0.9
Start-up
Hold-on
0.6
400
300
200
VIN=2.0V
0.3
VIN=1.8V
100
VIN=1.5V
VIN=1.2V
0
0
0
5
10
15
0
20
50
100
150
200
250
Output Current (mA)
Output Current (mA)
Fig 25. HT7730S Start-up & Hold-on Voltage
Fig 26. HT7730S Ripple Voltage vs. Output Current
Fig 27. HT7730S Load Transient Response
Fig 28. HT7730S Line Transient Response
(L=10μH, CIN=COUT=10μF, VIN=1.8V)
(L=10μH, CIN=COUT=10μF, VIN=1.8V)
Rev. 1.00
11
February 22, 2012
HT77xxS
3
100%
2.8
80%
Efficiency (%)
Output Voltage (V)
HT7727S
2.6
2.4
60%
40%
VIN=2.0V
VIN=2.0V
VIN=1.8V
VIN=1.8V
2.2
20%
VIN=1.6V
VIN=1.6V
VIN=1.2V
VIN=1.2V
0%
2
0
50
100
150
0
200
50
Output Current (mA)
Fig 29. HT7727S Output Voltage vs. Output Current
150
200
Fig 30. HT7727S Efficiency vs. Output Current
1.2
200
0.9
150
Ripple Voltage (mV)
Input Voltage (V)
100
Output Current (mA)
Start-up
Hold-on
0.6
0.3
100
VIN=2.0V
VIN=1.8V
50
VIN=1.6V
VIN=1.2V
0
0
0
5
10
15
20
0
Output Current (mA)
50
100
Output Current (mA)
150
200
Fig 31. HT7727S Start-up & Hold-on Voltage
Fig 32. HT7727S Ripple Voltage vs. Output Current
Fig 33. HT7727S Load Transient Response
Fig 34. HT7727SLine Transient Response
(L= 10μH, CIN= COUT= 10μF, VIN= 1.62V)
(L= 10μH, CIN= COUT= 10μF, VIN= 1.62V)
Rev. 1.00
12
February 22, 2012
HT77xxS
82
81
HT7727S NO.1
1.1
HT7727S NO.2
Oscillator Duty Cycle (%)
Output Voltage Tolerance (%)
2
0.2
-0.7
-1.6
HT7727S NO.1
80
HT7727S NO.2
79
78
77
76
-2.5
-40
-15
10
35
60
-40
85
-15
10
35
60
85
Temperature (℃)
Temperature (℃)
Fig 35. HT7727S Output Voltage Tolerance vs.
Fig 36. HT7727S Oscillator Duty Cycle vs.
Temperature
Temperature
750
Oscillator Frequency (KHz)
675
HT7727S NO.1
600
HT7727S NO.2
525
450
375
300
-40
-15
10
35
60
85
Temperature (℃)
Fig 37. HT7727S Oscillator Frequency vs.
Fig 38. HT7727S LX Leakage Current vs.
Temperature
Temperature
Rev. 1.00
13
February 22, 2012
HT77xxS
2.4
100%
2.32
80%
Efficiency (%)
Output Voltage (V)
HT7722S
2.24
2.16
60%
40%
VIN=2.0V
VIN=2.0V
2.08
VIN=1.8V
20%
VIN=1.8V
VIN=1.5V
VIN=1.5V
VIN=1.2V
VIN=1.2V
0%
2
0
0
50
100
150
50
200
100
150
200
Output Current (mA)
Output Current (mA)
Fig 39. HT7722S Output Voltage vs. Output Current
Fig 40. HT7722S Efficiency vs. Output Current
1.2
600
500
Ripple Voltage (mV)
Input Voltage (V)
0.9
Start-up
Hold-on
0.6
400
300
VIN=2.0V
200
VIN=1.8V
0.3
VIN=1.5V
100
VIN=1.2V
0
0
0
5
10
15
0
20
50
100
150
200
Output Current (mA)
Output Current (mA)
Fig 41. HT7722S Start-up & Hold-on Voltage
Fig 42.HT7722S Ripple Voltage vs. Output Current
Fig 43. HT7722S Load Transient Response
Fig 44. HT7722SLine Transient Response
(L= 10μH, CIN= COUT= 10μF, VIN= 1.32V)
Rev. 1.00
(L= 10μH, CIN= COUT= 10μF, VIN= 1.32V)
14
February 22, 2012
HT77xxS
1.9
100%
1.85
80%
Efficiency (%)
Output Voltage (V)
HT7718S
1.8
1.75
60%
40%
VIN=1.6V
VIN=1.6V
VIN=1.4V
1.7
VIN=1.4V
20%
VIN=1.2V
VIN=1.2V
VIN=1.08V
VIN=1.08V
1.65
0%
0
30
60
90
120
150
0
30
Fig 45. HT7718S Output Voltage vs. Output Current
90
120
150
Fig 46. HT7718S Efficiency vs. Output Current
1.2
200
0.9
150
Ripple Voltage (mV)
Input Voltage (V)
60
Output Current (mA)
Output Current (mA)
Start-up
Hold-on
0.6
0.3
100
VIN=1.6V
VIN=1.4V
50
VIN=1.2V
VIN=1.08V
0
0
0
5
10
15
20
0
Output Current (mA)
30
60
90
120
150
Output Current (mA)
Fig 47. HT7718S Start-up & Hold-on Voltage
Fig 48.HT7718S Ripple Voltage vs. Output Current
Fig 49. HT7718S Load Transient Response
Fig 50. HT7718S Line Transient Response
(L= 10μH, CIN= COUT= 10μF, VIN= 1.08V)
(L= 10μH, CIN= COUT= 10μF, VIN= 1.08V)
Rev. 1.00
15
February 22, 2012
HT77xxS
82
81
1.1
Oscillator Duty Cycle (%)
Output Voltage Tolerance (%)
2
HT7718S NO.1
0.2
HT7718S NO.2
-0.7
-1.6
80
79
78
HT7718S NO.1
HT7718S NO.2
77
76
-2.5
-40
-15
10
35
60
-40
85
-15
10
35
60
85
Temperature (℃)
Temperature (℃)
Fig 51. HT7718S Output Voltage Tolerance vs.
Fig 52. HT7718S Oscillator Duty Cycle vs.
Temperature
Temperature
750
Oscillator Frequency (KHz)
675
HT7718S NO.1
600
HT7718S NO.2
525
450
375
300
-40
-15
10
35
60
85
Temperature (℃)
Fig 53. HT7718S Oscillator Frequency vs.
Fig 54. HT7718S LX Leakage Current vs.
Temperature
Temperature
Rev. 1.00
16
February 22, 2012
HT77xxS
Typical Performance Characteristics
(L use multi-layered chip power inductor)
6
100%
5.2
80%
Efficiency (%)
Output Voltage (V)
HT7750S
4.4
3.6
VIN=3.0V
60%
40%
VIN=3.0V
VIN=2.0V
VIN=2.0V
VIN=1.5V
2.8
20%
VIN=1.5V
VIN=1.2V
VIN=1.2V
0%
2
0
50
100
150
200
Output Current (mA)
250
0
300
Fig 55. HT7750S Output Voltage vs. Output Current
50
100
150
200
Output Current (mA)
250
300
Fig 56. HT7750S Efficiency vs. Output Current
4
100%
3.7
80%
Efficiency (%)
Output Voltage (V)
HT7737S
3.4
3.1
60%
40%
VIN=2.0V
VIN=2.0V
VIN=1.8V
VIN=1.8V
2.8
20%
VIN=1.5V
VIN=1.5V
VIN=1.2V
VIN=1.2V
0%
2.5
0
50
100
150
0
200
50
Output Current (mA)
100
Output Current (mA)
150
200
Fig 58. HT7737S Efficiency vs. Output Current
Fig 57. HT7737S Output Voltage vs. Output Current
HT7733S
100%
3.5
80%
Efficiency (%)
Output Voltage (V)
3.3
3.1
60%
40%
VIN=2.0V
VIN=2.0V
2.9
VIN=1.8V
VIN=1.8V
20%
VIN=1.5V
VIN=1.5V
VIN=1.2V
VIN=1.2V
0%
2.7
0
50
100
150
0
200
Output Current (mA)
100
Output Current (mA)
150
200
Fig 60. HT7733S Efficiency vs. Output Current
Fig 59. HT7733S Output Voltage vs. Output Current
Rev. 1.00
50
17
February 22, 2012
HT77xxS
HT7730S
100%
3.3
80%
Efficiency (%)
Output Voltage (V)
3.1
2.9
60%
40%
VIN=2.0V
VIN=2.0V
2.7
VIN=1.8V
VIN=1.8V
20%
VIN=1.5V
VIN=1.5V
VIN=1.2V
VIN=1.2V
0%
2.5
0
50
100
150
200
250
0
50
100
150
Output Current (mA)
Output Current (mA)
200
250
Fig 62. HT7730S Efficiency vs. Output Current
Fig 61. HT7730S Output Voltage vs. Output Current
3
100%
2.8
80%
Efficiency (%)
Output Voltage (V)
HT7727S
2.6
2.4
60%
40%
VIN=2.0V
VIN=2.0V
VIN=1.8V
VIN=1.8V
2.2
20%
VIN=1.6V
VIN=1.6V
VIN=1.2V
VIN=1.2V
0%
2
0
50
100
150
200
0
50
Output Current (mA)
Fig 63. HT7727S Output Voltage vs. Output Current
100
Output Current (mA)
150
200
Fig 64. HT7727S Efficiency vs. Output Current
2.4
100%
2.32
80%
Efficiency (%)
Output Voltage (V)
HT7722S
2.24
2.16
60%
40%
VIN=2.0V
VIN=2.0V
VIN=1.8V
VIN=1.8V
2.08
20%
VIN=1.5V
VIN=1.5V
VIN=1.2V
VIN=1.2V
2
0%
0
50
100
150
200
0
Output Current (mA)
Fig 65. HT7722S Output Voltage vs. Output Current
Rev. 1.00
50
100
Output Current (mA)
150
200
Fig 66. HT7722S Efficiency vs. Output Current
18
February 22, 2012
HT77xxS
1.9
100%
1.85
80%
Efficiency (%)
Output Voltage (V)
HT7718S
1.8
1.75
60%
40%
VIN=1.6V
VIN=1.6V
VIN=1.4V
VIN=1.4V
1.7
20%
VIN=1.2V
VIN=1.2V
VIN=1.08V
VIN=1.08V
1.65
0%
0
30
60
90
120
150
0
Output Current (mA)
60
90
Output Current (mA)
120
150
Fig 68. HT7718S Efficiency vs. Output Current
Fig 67. HT7718S Output Voltage vs. Output Current
Rev. 1.00
30
19
February 22, 2012
HT77xxS
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 (http://www.holtek.com.tw/english/
literature/package.pdf) for the latest version of the package information.
3-pin SOT23 Outline Dimensions
Symbol
Dimensions in inch
Min.
Nom.
Max.
A
0.039
―
0.051
A1
―
―
0.004
A2
0.028
―
0.035
b
0.014
―
0.020
C
0.004
―
0.010
D
0.106
―
0.122
E
0.055
―
0.071
e
―
0.075
―
H
0.102
―
0.118
L
0.015
―
―
θ
0°
―
9°
Symbol
Rev. 1.00
Dimensions in mm
Min.
Nom.
Max.
A
1.00
―
1.30
A1
―
―
0.10
A2
0.70
―
0.90
b
0.35
―
0.50
C
0.10
―
0.25
D
2.70
―
3.10
E
1.40
―
1.80
e
―
1.90
―
H
2.60
―
3.00
L
0.37
―
―
θ
0°
―
9°
20
February 22, 2012
HT77xxS
5-pin SOT23-5 Outline Dimensions
Symbol
Dimensions in inch
Min.
Nom.
Max.
0.039
―
0.051
A1
―
―
0.004
A2
0.028
―
0.035
A
b
0.014
―
0.020
C
0.004
―
0.010
D
0.106
―
0.122
E
0.055
―
0.071
e
―
0.075
―
H
0.102
―
0.118
L
0.015
―
―
θ
0°
―
9°
Symbol
Rev. 1.00
Dimensions in mm
Min.
Nom.
Max.
A
1.00
―
1.30
A1
―
―
0.10
A2
0.70
―
0.90
b
0.35
―
0.50
C
0.10
―
0.25
D
2.70
―
3.10
E
1.40
―
1.80
e
―
1.90
―
H
2.60
―
3.00
L
0.37
―
―
θ
0°
―
9°
21
February 22, 2012
HT77xxS
3-pin SOT89 Outline Dimensions
Symbol
Dimensions in inch
Min.
Nom.
Max.
A
0.173
―
0.181
B
0.059
―
0.072
C
0.090
―
0.102
D
0.035
―
0.047
E
0.155
―
0.167
F
0.014
―
0.019
G
0.017
―
0.022
H
―
0.059
―
I
55
―
63
J
14
―
17
Symbol
Rev. 1.00
Dimensions in mm
Min.
Nom.
Max.
A
4.39
―
4.60
B
1.50
―
1.83
C
2.29
―
2.59
D
0.89
―
1.19
E
3.94
―
4.24
F
0.36
―
0.48
G
0.43
―
0.56
H
―
1.50
―
I
1.40
―
1.60
J
0.36
―
0.43
22
February 22, 2012
HT77xxS
3-pin TO92 Outline Dimensions
Symbol
Min.
Nom.
Max.
A
0.170
―
0.200
B
0.170
―
0.200
C
0.500
―
―
D
0.011
―
0.020
E
0.090
―
0.110
F
0.045
―
0.055
G
0.045
―
0.065
H
0.130
―
0.160
α
0°
―
10°
Symbol
A
Rev. 1.00
Dimensions in inch
Dimensions in mm
Min.
Nom.
Max.
4.32
―
5.08
B
4.32
―
5.08
C
12.70
―
―
D
0.28
―
0.51
E
2.29
―
2.79
F
1.14
―
1.40
G
1.14
―
1.65
H
3.30
―
4.06
α
0°
―
10°
23
February 22, 2012
HT77xxS
Product Tape and Reel Specifications
Reel Dimensions
SOT23-3, SOT23-5
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
178.0±1.0
B
Reel Inner Diameter
62.0±1.0
C
Spindle Hole Diameter
13.0±0.2
D
Key Slit Width
2.50±0.25
T1
Space Between Flange
8.4 +1.5/-0.0
T2
Reel Thickness
11.4 +1.5/-0.0
SOT89-3
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
178.0±1.0
B
Reel Inner Diameter
62.0±1.0
C
Spindle Hole Diameter
13.0±0.2
D
Key Slit Width
2.50±0.25
T1
Space Between Flange
8.4 +1.5/-0.0
T2
Reel Thickness
11.4 +1.5/-0.0
Rev. 1.00
24
February 22, 2012
HT77xxS
TO92 Reel Dimensions (Unit: mm)
Rev. 1.00
25
February 22, 2012
HT77xxS
Carrier Tape Dimensions
 SOT23-3, SOT23-5
Symbol
Description
Dimensions in mm
W
Carrier Tape Width
8.0±0.3
P
Cavity Pitch
4.0±0.1
E
Perforation Position
1.75±0.10
F
Cavity to Perforation (Width Direction)
3.50±0.05
D
Perforation Diameter
1.5 +0.1/-0.00
D1
Cavity Hole Diameter
1.5 +0.1/-0.00
P0
Perforation Pitch
P1
Cavity to Perforation (Length Direction)
2.00±0.05
A0
Cavity Length
3.15±0.10
B0
Cavity Width
3.2±0.1
K0
Cavity Depth
1.4±0.1
t
Carrier Tape Thickness
C
Cover Tape Width
Rev. 1.00
4.0±0.1
0.20±0.03
5.3±0.1
26
February 22, 2012
HT77xxS
SOT89-3
Symbol
Description
W
Carrier Tape Width
Dimensions in mm
12.0+0.3/-0.1
P
Cavity Pitch
E
Perforation Position
1.75±0.10
8.0±0.1
F
Cavity to Perforation (Width Direction)
5.50±0.05
D
Perforation Diameter
1.5 +0.1/-0.00
D1
Cavity Hole Diameter
1.5 +0.1/-0.00
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
4.8±0.1
B0
Cavity Width
4.5±0.1
K0
Cavity Depth
t
Carrier Tape Thickness
C
Cover Tape Width
Rev. 1.00
1.8±0.1
0.300±0.013
9.3±0.1
27
February 22, 2012
HT77xxS
Carrier Tape Dimensions
TO92
Symbol
Description
Dimensions in mm
I1
Taped Lead Length
P
Component Pitch
12.7±1.0
(2.5)
P0
Perforation Pitch
12.7±0.3
P2
Component to Perforation (Length Direction)
6.35±0.40
F1
Lead Spread
2.5 +0.4/-0.0
F2
Lead Spread
2.5 +0.4/-0.0
Δh
Component Alignment
W
Carrier Tape Width
W0
Hold-down Tape Width
6.0±0.5
W1
Perforation Position
9.0±0.5
W2
Hold-down Tape Position
H0
Lead Clinch Height
16.0±0.5
H1
Component Height
Less than 24.7
D0
Perforation Diameter
0.0±0.1
18.0 +1.0/-0.5
(0.5)
4.0±0.2
t
Taped Lead Thickness
0.7±0.2
H
Component Base Height
19.0±0.5
Note: Thickness less than 0.38±0.05mm~0.5mm.
P0 Accumulated pitch tolerance: ±1mm/20pitches.
( ) Bracketed figures are for reference only.
Rev. 1.00
28
February 22, 2012
HT77xxS
Holtek Semiconductor Inc. (Headquarters)
No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan
Tel: 886-3-563-1999
Fax: 886-3-563-1189
http://www.holtek.com.tw
Holtek Semiconductor Inc. (Taipei Sales Office)
4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan
Tel: 886-2-2655-7070
Fax: 886-2-2655-7373
Fax: 886-2-2655-7383 (International sales hotline)
Holtek Semiconductor Inc. (Shenzhen Sales Office)
5F, Unit A, Productivity Building, No.5 Gaoxin M 2nd Road, Nanshan District, Shenzhen, China 518057
Tel: 86-755-8616-9908, 86-755-8616-9308
Fax: 86-755-8616-9722
Holtek Semiconductor (USA), Inc. (North America Sales Office)
46729 Fremont Blvd., Fremont, CA 94538, USA
Tel: 1-510-252-9880
Fax: 1-510-252-9885
http://www.holtek.com
Copyright© 2011 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. 1.00
29
February 22, 2012