BD8313HFN_15 Datasheet, PDF (1/31 Pages) Rohm – 1ch Synchronous Buck Converter Integrated MOSFET

Datasheet
3.5V to 14V, 1.0A 1ch Synchronous Buck
Converter Integrated MOSFET
BD8313HFN
General Description
The BD8313HFN can produce stepped-down voltage
from a power supply composed of 4 batteries, which
can be Li2cell, Li3cell, etc., or from a 5V/12V fixed
power supply line. Output voltages include 1.2V, 1.8V,
3.3V, or 5.0V. This IC allows easy production of a
compact power supply since its high operating
frequency of 1.0MHz requires small-sized external
inductor and capacitor and the phase compensation
components are integrated in the chip. The built-in
synchronous rectification switches are capable of
withstanding 15V.
Features
 Built-In Pch/Nch Synchronous Rectification SW
Capable of Withstanding 1.2 A/15V.
 Built-In Phase Compensation Device between Input
and Output of Error AMP.
 Built-In Soft-Start Function.
 Built-In Short-Circuit Protection with Timer
Application
For Portable Equipments like DSC/DVC Powered by 4
Dry Batteries or Li2cell and Li3cell, or General
Consumer-Equipment with 5V/12V Lines
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
1.0A(Max)
1.0MHz(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
Typical Application Circuit
VVBBAATT==44.5.～5V10toV 10V
1100μµFF
GRM31CBE106KA75L
（Murata）
1_1μµ F
GRM188B11A105KA61
（Murata）
1¹Î¼^µF^F
GRM188B11A105KA61
（Murata）
GND
INV
VCC
VREG
STB
PVCC
ON/OFF
10pF
3.3V/500mA
6⁶8k^{8k Ω}
2²0⁰0⁰k^{k Ω}
PGND
LLxX
4_..₇7_μµ_HH
1127AS4R7M（TOKO）
Figure 1. Typical Application Circuit
515k1kΩ
1¹0⁰μ^µF^F
GRM31CB11A106KA01
（Murata）
2²2k^{2k Ω}
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays
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TSZ02201-0Q3Q0NZ00370-1-2
17.Feb.2015 Rev.002