MAX750A

Adjustable, PWM, Step-Down Regulator

We Recommend Improved Performance Devices, MAX887 for MAX750A, MAX1684/MAX1685 for MAX758A, for New Designs


Please check latest availability status for a specific part variant.

Description

The MAX750A/MAX758A are adjustable-output, CMOS, step-down, DC-DC switching regulators. The MAX758A accepts inputs from 4V to 16V and delivers 750mA, while the MAX750A accepts inputs from 4V to 11V and delivers 450mA. Typical efficiencies are 85% to 90%. Typical quiescent current is 1.7mA, or only 6µA in shutdown mode. The output does not exhibit any ripple at subharmonics of the switching frequency over its specified range.

Pulse-width-modulation (PWM) current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be ±4.5% plus feedback-resistor tolerance over line, load, and temperature variations. Fixed-frequency switching and absence of subharmonic ripple allows easy filtering of output ripple and noise, as well as the use of small external components. These regulators require only a single inductor value to work in most applications, so no inductor design is necessary.
MAX750A, MAX758A: Typical Operating Circuit MAX750A, MAX758A: Typical Operating Circuit Enlarge+

Key Features

  • Up to 750mA Load Currents
  • 160kHz High-Frequency, Current-Mode PWM
  • 85% to 96% Efficiencies
  • 33µH or 100µH Pre-Selected Inductor Value, No Component Design Required
  • 1.7mA Quiescent Supply Current
  • 6µA Shutdown Supply Current
  • Adjustable Output Voltage
  • Overcurrent, Soft-Start, and Undervoltage Lockout Protection
  • Cycle-by-Cycle Current Limiting
  • 8-Pin DIP/SO Packages (MAX750A)

Applications/Uses

  • Cell Phones
  • Computer Peripherals
  • Portable Communications Equipment
  • Portable Instrumentation
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX750A 4111.2511Resistor0.45Internal1190
PDIP/8
SOIC (N)/8
$2.51 @1k
MAX758A 16160.75
PDIP/8
SOIC (W)/16
$3.55 @1k
See All Step-Down Switching Regulators (404)
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.

Quality and Environmental Data

Request Reliability Report for: MAX750A 
Lead-Free Package Tin (Sn) Whisker Reports
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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