MAX1692

Low-Noise, 5.5V Input, PWM Step-Down Regulator

Tiny Switcher Delivers 600mA and 10x Better Performance Than LDO


Please check latest availability status for a specific part variant.

Description

The MAX1692 is a low-noise, pulse-width-modulated (PWM), DC-DC step-down converter. It powers logic and transmitters in small wireless systems such as cellular phones, communicating PDAs, and handy-terminals. The device features an internal synchronous rectifier for high efficiency; it requires no external Schottky diode. Excellent noise characteristics and fixed-frequency operation provide easy post-filtering. The MAX1692 is ideally suited for Li-Ion battery applications. It is also useful for +3V or +5V fixed input applications.

The device operates in one of four modes. Forced PWM mode operates at a fixed frequency regardless of the load. Synchronizable PWM mode allows an external switching frequency to control and minimize harmonics. Idle Mode™ (PWM/PFM) extends battery life by switching to a PFM pulse-skipping mode during light loads. Shutdown mode places the device in standby, reducing quiescent supply current to under 0.1µA.

The MAX1692 can deliver over 600mA. The output voltage can be adjusted from 1.25V to VIN with the input range of +2.7V to +5.5V. Other features of the MAX1692 include high efficiency, low dropout voltage, and a 1.2%-accurate 1.25V reference. It is available in a space-saving 10-pin µMAX package with a height of only 1.11mm.
MAX1692: Typical Operating Circuit MAX1692: Typical Operating Circuit Enlarge+

Key Features

  • +2.7V to +5.5V Input Range
  • Adjustable Output from 1.25V to VIN
  • 600mA Guaranteed Output Current
  • 95% Efficiency
  • No Schottky Diode Required
  • 85µA Quiescent Current
  • 100% Duty Cycle in Dropout
  • 750kHz Fixed-Frequency PWM Operation
  • Synchronizable Switching Frequency
  • Accurate Reference: 1.25V (±1.2%)
  • Small 10-Pin µMAX Package

Applications/Uses

  • Battery-Operated Devices (1 Li+ or 3 NiMH/NiCd)
  • Cell Phones
  • Cordless Phones
  • CPU I/O Supplies
  • Notebook Chipset Supplies
  • PDAs and Handy-Terminals
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX1692 2.75.51.255.5
Preset
Resistor
0.6InternalYes1750
UMAX/10
$2.92 @1k
See All Step-Down Switching Regulators (389)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX1692EVKIT: Evaluation Kit for the MAX1692
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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