AAT3601 Buy Now
Total Power Solution for Portable Applications

The AAT3601 is a member of AnalogicTech’s Total Power Management IC™ (TPMIC™) product family. It contains a single-cell Lithium Ion/Polymer battery charger, a fully integrated step down converter and 5 low dropout (LDO) regulators. The device also includes 2 load switches for dynamic power path/sleep mode operation, making it ideal for small portable short-range communications enabled mobile devices and telephones.

The battery charger is a complete thermally regulated constant current/constant voltage linear charger. It includes an integrated pass device, reverse blocking protection, high accuracy current and voltage regulation, charge status, and charge termination. The charging current and the charge termination current as well as recharge voltage are programmable with either an external resistor and/or by a standard I²C interface.

The step-down DC/DC converter is integrated with internal compensation and operates at a switching frequency of 1.5MHz, thus minimizing the size of external components while keeping switching losses low and efficiency greater than 95%. All LDO output voltages are programmable using the I2C interface.

The five LDOs offer 60dB power supply rejection ratio (PSRR) and low noise operation making them suitable for powering noise-sensitive loads. The LDOs and DC/DC converter are separated into Permanent-Enabled (PE) and Non-Permanent (NP) enabled supplies.

All six voltage regulators operate with low quiescent current. The total no load current when the 3 PE LDOs are enabled is only 200µA.

The device includes a watchdog timer input and two reset outputs for the watchdog and LDO regulation. The device also can be programmed through a standard I2C interface.

The AAT3601 is available in a thermally enhanced low profile 5x5x0.8mm 36-pin TQFN package.


  • Voltage Regulator VIN Range: 4.5V to 6V
  • Complete Power Integration
  • Integrated Load Switches to Power Converters from AC Adapter or Battery Automatically
  • Low Standby Current
  • 200µA (typ) w/LDO1, LDO2 and LDO5 Active,No Load
  • One Step-Down Buck Converter (NP)
  • 1.24V, 300mA Output
  • 1.5MHz Switching Frequency
  • Fast Turn-On Time (120µs typ)
  • Five LDOs Programmable by I²C
  • LDO1: 3.4V, 150mA (PE)
  • LDO2: 3.4V, 300mA (NP)
  • LDO3: 1.24V, 300mA (PE)
  • LDO4: 1.85V, 300mA (NP)
  • LDO5: 1.85V, 300mA (PE)
  • PSRR: 60dB @10kHz
  • Noise: 50µVrms
  • One Battery Charger
  • Digitized Thermal Regulation
  • Charge Current Programming up to 1.4A
  • Charge Current Termination Programming
  • Automatic Trickle Charge for Battery Preconditioning(2.8V Cutoff)
  • Watchdog (WDI) Timer Input
  • Two Reset (RSTIN, RSTLPW) Timer Outputs
  • Separate Enable Pins for PE and NP Supplies
  • Digital Programming of Major Parameters via I²C
  • Over-Current Protection
  • Over-Temperature Protection
  • 5x5mm TQFN55-36 Package
Data Sheets AAT3601 Data Sheet AAT3601_202210B.pdf (3822 KB)
Designer Info AAT3601 Block Diagram AATI_BD_218.jpg (62 KB)
Designer Info AAT3601 Gerber File AATI_Gerber_218.zip (82 KB)
ProductName : AAT3601
Battery Charger Type : Linear
Number of Step-up Switching Regulators : 0
Number of Step-down Switching Regulators : 1
Number of LDO Regulators : 5
Min. VIN (V) : 4.5
Max. Regulator VIN (V) : 6
Max Charger VIN (V) : 6
Max Charger Protected VIN (V) : N/A
Max. Charge Current (mA) : 1440
Max. Single/ Channel Output Current (mA) : 300
Min. Single/ Ch Output Voltage (V) : 1.24
Max Step-up Output Voltage (V) : N/A
Output Voltage Control : Fixed
Operating Frequency (kHz) : 1500
Package (mm) : TQFN 36L, 5 x 5 x 0.8
Product Information:
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