BD8312HFN_15 Datasheet, PDF (1/25 Pages) Rohm – 1ch Synchronous Buck Converter Integrated MOSFET

Datasheet
3.5V to 14V, 0.8A 1ch Synchronous Buck
Converter Integrated MOSFET
BD8312HFN
General Description
BD8312HFN can produce 1.2V, 1.8V, 3.3V, or 5V
stepped-down output voltages from a power supply
composed of 4 batteries, which can be Li2cell, Li3cell,
or from a 5V/12V fixed power supply line. The built-in
synchronous rectification switches are capable of
withstanding up to15V. This IC has a flexible phase
compensation system and a switching frequency of
1.5MHz allowing the use of smaller external output
inductor and capacitor making the construction of a
compact power supply really easy.
Features
 Built-In 1.0A/15V Pch/Nch Synchronous
Rectification SW
 On-Chip Phase Compensation Device between
Input and Output of Error AMP.
 Built-In Soft-Start Function.
 Built-In Timer Latch System for Short Circuit
Protection Function.
Application
For Portable Equipments like DSC/DVC Powered by 4
Dry Batteries or Li2cell and Li3cell, or General
Consumer-Equipment with 5V/12 V Lines
Typical Application Circuit
Input: 4.5V to 10V, output: 3.3V / 500mA
VBAT=4.5V to 10V
Key Specifications
 Input Voltage Range:
 Output Voltage Range:
 Output Current:
 Switching Frequency:
 Pch FET ON-Resistance:
 Nch FET ON-Resistance:
 Standby Current:
 Operating Temperature Range:
+3.5V to +14V
+1.2V to +12V
0.8A(Max)
1.5MHz(Typ)
450mΩ(Typ)
300mΩ(Typ)
0μA(Typ)
-25°C to +85°C
Package
W (Typ) x D (Typ) x H (Max)
HSON8
2.90mm x 3.00mm x 0.60mm
LX
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
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TSZ22111・14・001
○This product has no designed protection against radioactive rays
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TSZ02201-0Q3Q0NZ00360-1-2
17.Feb.2015 Rev.002