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Step-up Converter. HT7730BA Datasheet

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Step-up Converter. HT7730BA Datasheet






HT7730BA Converter. Datasheet pdf. Equivalent




HT7730BA Converter. Datasheet pdf. Equivalent





Part

HT7730BA

Description

5V/200mA PFM Asynchronous Step-up Converter



Feature


HT77xxBA 5V/200mA PFM Asynchronous Step- up Converter Features • Low startup voltage: 0.85V (Typical) • High eff iciency up to 85% • Ultra low no loa d input current • High output voltag e accuracy: ±2.5% • Fixed output vo ltage: 2.7V, 3.0V, 3.3V, 3.7V and 5.0V • Ultra low shutdown current: 0.1μA (Typical) • Package type: TO92, SOT 89-3, SOT23-3 and SOT23-5 Applicat.
Manufacture

Holtek Semiconductor

Datasheet
Download HT7730BA Datasheet


Holtek Semiconductor HT7730BA

HT7730BA; ions • One, two and three cell alkali ne and NiMH/NiCd bettery powered portab le products • Portable equipment/han dheld devices General Description The HT77xxBA series is a set of PFM step-up DC/DC converters with high efficiency and low ripple. The series features ex tremely low start-up voltage and high o utput voltage accuracy. They require on ly few external compon.


Holtek Semiconductor HT7730BA

ents to provide a fixed output voltage o f 2.7V, 3.0V, 3.3V, 3.7V and 5.0V. CMOS technology ensures low supply current and makes them ideal for battery-operat ed applications powered from one or mor e cells. The HT77xxBA series consist of an o .


Holtek Semiconductor HT7730BA

.

Part

HT7730BA

Description

5V/200mA PFM Asynchronous Step-up Converter



Feature


HT77xxBA 5V/200mA PFM Asynchronous Step- up Converter Features • Low startup voltage: 0.85V (Typical) • High eff iciency up to 85% • Ultra low no loa d input current • High output voltag e accuracy: ±2.5% • Fixed output vo ltage: 2.7V, 3.0V, 3.3V, 3.7V and 5.0V • Ultra low shutdown current: 0.1μA (Typical) • Package type: TO92, SOT 89-3, SOT23-3 and SOT23-5 Applicat.
Manufacture

Holtek Semiconductor

Datasheet
Download HT7730BA Datasheet




 HT7730BA
HT77xxBA
5V/200mA PFM
Asynchronous Step-up Converter
Features
• Low startup voltage: 0.85V (Typical)
• High efficiency up to 85%
• Ultra low no load input current
• High output voltage accuracy: ±2.5%
• Fixed output voltage: 2.7V, 3.0V, 3.3V, 3.7V and
5.0V
• Ultra low shutdown current: 0.1μA (Typical)
• Package type: TO92, SOT89-3, SOT23-3 and
SOT23-5
Applications
• One, two and three cell alkaline and NiMH/NiCd
bettery powered portable products
• Portable equipment/handheld devices
General Description
The HT77xxBA series is a set of PFM step-up DC/DC
converters with high efficiency and low ripple. The
series features extremely low start-up voltage and
high output voltage accuracy. They require only
few external components to provide a fixed output
voltage of 2.7V, 3.0V, 3.3V, 3.7V and 5.0V. CMOS
technology ensures low supply current and makes
them ideal for battery-operated applications powered
from one or more cells.
The HT77xxBA series consist 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, SOT89-3,
SOT23-3 and SOT23-5 packages. For the SOT23-5
package, it also contains a chip enable function to
reduce power consumption during shutdown mode.
Typical Application Circuits
D1: 1N5817
L1: 47μH~100μH
(Coil Inductor)
VIN LX
OUT
C1: 47μF
OFF ON
HT77xxBA
CE
GND
* R1=0.15is recommended to improve ripple performance
VOUT
R1*
C2: 22μF
(Ceramic)
Selection Table
Part No.
HT7727BA
HT7730BA
HT7733BA
HT7737BA
HT7750BA
Output Voltage
2.7V
3.0V
3.3V
3.7V
5.0V
Note: ″xx″ stands for output voltages.
Packages
SOT89-3
SOT23-3
TO-92
SOT23-5
Markings
77xxBA marking for TO92 and SOT89-3 types
xxBA marking for SOT23-3 and SOT23-5 types
Rev. 1.00
1 November 03, 2017




 HT7730BA
Block Diagram
LX LX Limiter
Buffer
200kHz OSC
PFM Control
HT77xxBA
VREF
OUT
GND
Chip Enable
CE
Pin Assignment
SOT23-3
OUT
3
xxBA
1
GND
2
LX
SOT23-5
LX
5
GND
4
xxBA
1 23
CE OUT NC
SOT89-3
77xxBA
1 23
GND OUT LX
TO92
77xxBA
1 23
GNDOUT LX
Pin Description
TO92
2
1
3
Pin No.
SOT89-3
SOT23
——
23
——
11
32
SOT23-5
1
2
3
4
5
Pin Name
Pin Description
CE
OUT
NC
GND
LX
Chip enable pin, high active.
Output voltage pin
No connection
Ground pin
Switching pin
Rev. 1.00
2 November 03, 2017




 HT7730BA
Absolute Maximum Ratings
Parameter
OUT
LX and CE
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering 10sec)
ESD Susceptibility
Junction-to-Ambient Thermal Resistance, θJA
Power Dissipation, PD
Human Body Mode
Machine Mode
TO92
SOT89-3
SOT23-3
SOT23-5
TO92
SOT89-3
SOT23-3
SOT23-5
Value
-0.3 to +6.0
-0.3 to +6.0
+150
-65 to +150
+260
5000
400
200
200
500
500
0.625
0.625
0.25
0.25
HT77xxBA
Unit
V
V
˚C
˚C
˚C
V
V
˚C/W
W
Recommended Operating Ratings
Parameter
VIN
Operating Temperature Range
Value
0.85 to 5
-40 to +85
Unit
V
˚C
Note that Absolute Maximum Ratings indicate limitations beyond which damage to the device may occur.
Recommended Operating Ratings indicate conditions for which the devices are intended to be functional, but do
not guarantee specified performance limits.
Rev. 1.00
3 November 03, 2017



Recommended third-party HT7730BA Datasheet






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