Ver14 Oct 222015
Features
 External parts Coil capacitor
 Output voltage Settable to between
21V to 55V in 01V steps
 Maximum Oscillation
frequency 300KHz
 Accuracy of ±2
 High efficiency 95
 Package SOT23 and TO92
Applications
 Digital cameras
 Electronic notebooks and PDAS
 Portable CDMD players
 Cameras video equipment
 Communications equipment
 Power supply for microcomputers
General Description
The HE9116 Series is a Synchronous
stepup DCDC Converter with PFM Control
With the HE Series a stepup switching DC
DC converter can be configured by using
an external coil capacitor The builtin
MOSFET is turned off by a protection circuit
when the voltage at the LX pin exceeds the
limit to prevent it from being damaged
Block Diagram
Order Information
HE9116①②③④⑤
Designator Symbol Description
1 A Standard
B Another pin definition
②③ Integer Output Voltage
(21~55) eg30V②：3③：0
④ N PackageSOT23
T PackageTO92
⑤ R RoHS Pb Free
G Halogen Free
HE9116 Synchronous StepUp
DCDC Converter with PFM ControlVer14 Oct 222015
Pin Assignment
Table1 HE9116A series (SOT23 PKG)
PIN NO PIN NAME FUNCTION
1 VOUT Output voltage pin
2 GND GND pin
3 LX External inductor connection pin
Table2 HE9116A series (TO92 PKG)
PIN NO PIN NAME FUNCTION
1 GND GND pin
2 VOUT Output voltage pin
3 LX External inductor connection pin
Table3 HE9116B series (TO92PKG)
PIN NO PIN NAME FUNCTION
1 VOUT Output voltage pin
2 GND GND pin
3 LX External inductor connection pin
HE9116 Synchronous StepUp
DCDC Converter with PFM ControlVer14 Oct 222015
Absolute Maximum Ratings
(Unless otherwise specified Ta25℃)
PARAMETERSYMBOLRATINGSUNITS
VOUT Pin Voltage VOUT VSS03~VSS+8 V
EN Pin Voltage EN VSS03~VSS+8 V
LX Pin Voltage VLX VSS03~VSS+8 V
LX Pin Current ILX 1000 mA
Power
Dissipation
SOT23
PD
250 mW
SOT233SOT235 250 mW
SOT893 500 mW
TO92 500 mW
Operating Temperature TOPR40~+85 ℃
Storage Temperature TSTG40~+125 ℃
Soldering Temperature & Time TSOLDER 260℃10s
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
(Unless otherwise specifiedTa 25℃)
PARAMETERSYMBOLMINTYPMAXUNITSCONDITION
Output Voltage VOUT
VOUT(S)
X098
VOUT
VOUT(S)
X102
V
Input Voltage VIN 75 V
Operation Start Voltage VST1 09 V IOUT1mA
Input Current At No Load ISS1 15 uA VIN18V VOUT30V
Current Consumption 2 ISS2 6 10 uA VOUTVOUT(s)+05V
Current Consumption
During Shutdown
ISSS 10 uA VEN0V
Maximum Oscillation
Frequency
fosc 300 KHz
VOUT095xVOUT(s) measure
Waveform at LX pin
Duty Ratio1 Duty1 70 78 85 VOUT095xVOUT(s)
Efficiency EFF1 90
Shutdown Pin Input
Voltage
VSH 075 V
VOUT095xVOUT(s) judge
Oscillation at LX pin
VSL 03 V
VOUT095xVOUT(s) judge
stop at LX pin
Shutdown Pin input
Current
ISH01 01 uA VEN6V
ISL01 01 uA VEN0V
Remark VOUT(S) specified above is the set output voltage valueand VOUT is the typical value of the
actual output voltage
HE9116 Synchronous StepUp
DCDC Converter with PFM ControlVer14 Oct 222015
Application Circuits
NoteExternal Component Recommendation
1) L47uH(Sumida)
2) C100uF16V(Tantalum)
HE9116 Synchronous StepUp
DCDC Converter with PFM ControlVer14 Oct 222015
TYPICAL PERFORMANCE CHARACTERISTICS
(CinCout100uFL47uH)
HE9116 Synchronous StepUp
DCDC Converter with PFM ControlVer14 Oct 222015
Package Information
3pin SOT23 Outline Dimensions
HE9116 Synchronous StepUp
DCDC Converter with PFM ControlVer14 Oct 222015
3pin TO92 Outline Dimensions
HE9116 Synchronous StepUp
DCDC Converter with PFM Control

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