Data Sheet
QUAD OP AMP AND VOLTAGE REFERENCE
General Description
The AP4303 is a monolithic IC that contains quad
operational amplifiers and a precision shunt regulator,
1.25Vfor AP4303-C or 1.24V for AP4303-D respec-
tively. It is specifically designed to regulate the output
current and voltage levels of switching battery charg-
ers and power supplies.
The four Op Amps feature accurate voltage and current
control. Combining a stable voltage reference with the
four Op Amps makes AP4303 ideal for use in multi-
function charger, power supply voltage monitor, signal
processing and control system.
The IC offers the power converter designer a control
solution that features increased precision with a corre-
sponding reduction in system complexity and cost.
The AP4303 is available in standard packages of DIP-
16 and SOIC-16.
AP4303
Features
Op Amp
·
Input Offset Voltage: 0.5mV
·
Supply Current: 250µA per Op Amp at 5.0V Sup-
ply Voltage
·
Unity Gain Bandwidth: 1MHz
·
Output Voltage Swing: 0 to (V
CC
-1.5)V
·
Power Supply Range: 3 to 18V
Voltage Reference
·
Reference Voltage Tolerance: 0.5%, 1%
·
Sink Current Capability from 0.1 to 80mA
·
Output Dynamic Impedance: 0.2Ω
·
Externally Adjusted Output Voltage Reference:
1.25V for AP4303-C and 1.24V for AP4303-D
Applications
·
·
Battery Charger
Switching Power Supply
SOIC-16
DIP-16
Figure 1. Package Types of AP4303
Jul. 2006 Rev. 1. 2
1
BCD Semiconductor Manufacturing Limited