DESCRIPTION
The AIC1630A is a DC-DC converter designed to drive an external power switch for more flexibility, especially in higher voltage and larger power applications.
Typically six components are required to set up a step up configuration easily achieving efficiency beyond 80%.
A few more components are required to set up a step down configuration delivering 4A load current with 83% typical efficiency, 86% at 2A load, and 300μA quiescent current.
The output voltage can be internally set to 5V or externally set to an arbitrary value below
breakdown voltage of the power switch.
Logiccontrolled shutdown mode is provided for power saving.
The low battery detector can be also configured as a linear regulator.
120KHz switching rate reduces the inductor size.
Inductors of 25μH to 50μH inductance are recommended for most applications.

FEATURES
* Default +5V Output Voltage.
* Adjustable Output Voltage with Two Resistors.
* Power-Saving Shutdown Mode (7μA typical).
* 120KHz Switching Rate.
* On-Chip Low Battery Detector.

APPLICATIONS
* Palmtop & Notebook Computers.
* Battery Charger Supply.
* Cellular Telephone.
* LCD Contrast Supply.
* Flash Memory Programmer.
* Battery Backup Supplies.
* Portable Instruments.

AIC1630ACN
AIC1630ACS

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DESCRIPTION
 The MC34063A by Analog Integrations Corporation, an improved second source over the
industrial standard MC34063A, is a monolithic control circuit containing the primary functions required for DC/DC converters.
The device consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This device is specifically designed to be incorporated in stepdown, step-up and voltage-inverting applications with a minimum number of external components.
The ±1.8% internal reference and low quiescent current of 1.6mA are among the improvements of the device over the competition.

FEATURES
* 3V to 30V Input Voltage Operation.
* Internal 1.6A Peak Current Switch.
* Internal ±1.8% Reference.
* Low Quiescent Current at 1.6mA.
* Frequency Operation from 100Hz to 100KHz.
* Current Limiting.

APPLICATIONS
* Saver for Cellular phones
* DC-DC Converter Module

MC34063ACN
MC34063ACS

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FEATURES
* Guaranteed Start-Up from Below 0.9 V.
* High Efficiency.
* Low Quiescent Current.
* Few Number of External Components needed.
* Low Ripple and Low Noise.
* Fixed Output Voltage: 2.7, 3.0V, 3.3V, and 5V.
* Driver for External Transistor.
* Space Saving SOT-89 and TO-92 Packages.

APPLICATIONS
* Pagers.
* Cameras.
* Wireless Microphones.
* Pocket Organizers.
* Battery Backup Suppliers.
* Portable Instruments.

DESCRIPTION
The AIC1639 is a high efficiency step-up DC/DC converter for applications using 1 to 4 battery cells.
Only three external components are required to deliver a fixed output voltage of 2.7, 3.0V, 3.3V, or 5V.
The AIC1639 starts up from below 0.9V input with 1mA load. Pulse Frequency Modulation scheme brings optimized performance for applications with light output loading and low input voltages. The output ripple and noise are lower compared with the circuits operating in PSM mode.
The PFM control circuit operating in 100KHz (max.) switching rate results in smaller passive components.
The space saving SOT-89 and TO-92 packages make the AIC1639 an ideal choice of DC/DC
converter for space conscious applications, like pagers, electronic cameras, and wireless microphones.
Provided with an external transistor driver pin (EXT), the AIC1639 is recommended for applications requiring current as large as several tens to several hundreds of milli-amperes.

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* FEATURES
- Low Dropout Voltage of 650mV at 500mA
Output Current (3V Output Version).
- Guaranteed 500mA Output Current.
- Low Ground Current at 65mA.
- 2% Accuracy Output Voltage of 1.8V/ 2.0V /2.5V /2.7V/ 3.0V/ 3.3V/ 3.5V/ 3.7V/ 3.8V/ 5.0V/ 5.2V.
- Needs only 4.7mF for Stability.
- Current and Thermal Limiting.

* APPLICATIONS
- Voltage Regulator for CD-ROM Drivers.
- Voltage Regulator for LAN Cards.
- Voltage Regulator for Microprocessor.
- Voltage Regulator for RAM Module.
- Wireless Communication Systems.
- Battery Powered Systems.

* DESCRIPTION
The AIC1735 is a 3-pin low dropout linear regulator. The superior characteristics of the
AIC1735 include zero base current loss, very low dropout voltage, and 2% accuracy output
voltage. Typical ground current remains approximately 65 m A, from no load to maximum loading conditions.
 Dropout voltage at 100mA output current is exceptionally low. Output current limiting and thermal limiting are built in to provide maximal protection to the AIC1735 against fault conditions.
The AIC1735 comes with the popular SOT- 223 and TO-252 packages.

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