BM34063
DC-DC CONVERTER


2004/06/15 1

Features Description
z 3V to 40V Input Voltage Operation
z Internal 1.6A Peak Current Switch
z Internal ±1.8% Reference
z Low Quiescent Current at 1.6mA
z Frequency Operation from 100Hz~100KHz
z Output Voltage Adjustable
z Active Current Limiting
z Step-Up, Step-Down or Inverting Switching
Regulators

The BM34063 Series is a monolithic control circuit
containing the primary functions required for DC-to-DC
converters. These devices consist of an internal
temperature compensated reference, comparator,
controlled duty cycle oscillator with an active current limit
circuit, driver and high current output switch.


Pin Assignment

Pin1: Switch Collector (SWC) Pin5: Comparator Inverting Input (FB)
Pin2: Switch Emitter (SWE) Pin6: Voltage Supply (Vcc)
Pin3: Timing Capacitor (TC) Pin7: Ipk Sense (Ipk)
DIP/SOP-8
1
2
3
4
8
7
6
5
SWC
SWE
TC
GND
DRC
Ipk
VCC
FB

Pin4: Ground (GND) Pin8: Voltage Driver Collector (DRC)


Ordering Information

Part Number Package
BM34063HP DIP-8
BM34063HS SOP-8