MAX738A
PRODUCTION5V, Step-Down, Current-Mode PWM DC-DC Converters
We Recommend Improved Performance Devices, MAX1684/MAX1685, for New Designs
- Part Models
- 7
- 1ku List Price
- Starting From $5.85
Overview
- 750mA Load Currents (MAX738A/MAX744A)
- High-Frequency, Current-Mode PWM
- 159kHz to 212.5kHz Guaranteed Oscillator Frequency Limits (MAX744A)
- 85% to 96% Efficiencies
- 1.7mA Quiescent Current
- 6µA Shutdown Supply Current
- Single Preselected Inductor Value, No Component Design Required
- Overcurrent, Soft-Start, and Undervoltage Lockout Protection
- Cycle-by-Cycle Current Limiting
- 8-Pin DIP/SO Packages (MAX730A)
The MAX730A/MAX738A/MAX744A are 5V-output CMOS, step-down switching regulators. The MAX738A/MAX744A accept inputs from 6V to 16V and deliver 750mA. The MAX744A guarantees 500mA load capability for inputs above 6V and has tighter oscillator frequency limits for low-noise (radio) applications. The MAX730A accepts inputs between 5.2V and 11V and delivers 450mA for inputs above 6V. Typical efficiencies are 85% to 96%. Quiescent supply current is 1.7mA and only 6µA in shutdown.
Pulse-width modulation (PWM) current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be ±5% over line, load, and temperature variations. Fixed-frequency switching 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.
The MAX730A/MAX738A/MAX744A also feature cycle-by-cycle current limiting, overcurrent limiting, undervoltage lockout, and programmable soft-start protection.
Applications
- Cell Phones
- Computer Peripherals
- Distributed Power Systems
- Personal Communicators
- Portable Instrumentation
Documentation
Data Sheet 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX738ACPA+ | PDIP | ||
| MAX738ACWE+ | Small-Outline IC Wide (0.3in) | ||
| MAX738ACWE+T | Small-Outline IC Wide (0.3in) | ||
| MAX738AEPA+ | PDIP | ||
| MAX738AEWE+ | Small-Outline IC Wide (0.3in) | ||
| MAX738AEWE+T | Small-Outline IC Wide (0.3in) | ||
| MAX738AMJA/883B | Ceramic Dual-In-Line, Narrow (0.3in) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Dec 9, 2025 - 2444 WAFER FAB |
||
| MAX738ACPA+ | PRODUCTION | |
| MAX738ACWE+ | PRODUCTION | |
| MAX738ACWE+T | PRODUCTION | |
| MAX738AEPA+ | PRODUCTION | |
| MAX738AEWE+ | PRODUCTION | |
| MAX738AEWE+T | PRODUCTION | |
| MAX738AMJA/883B | PRODUCTION | |
|
Apr 20, 2026 - 2571A PIN/ERRATA |
||
| MAX738ACWE+T | PRODUCTION | |
| MAX738AEWE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Switching Regulators & Controllers 1 | ||
| MAX1684 | PRODUCTION | Low-Noise, 14V Input, 1A, PWM Step-Down Converters |
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