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MAX750A, MAX758A
Adjustable, PWM, Step-Down Regulator
We Recommend Improved Performance Devices, MAX887 for MAX750A, MAX1684/MAX1685 for MAX758A, for New Designs
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Status
Active: In Production.
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.
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Data Sheet
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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)
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Applications/Uses
- Cell Phones
- Computer Peripherals
- Portable Communications Equipment
- Portable Instrumentation
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Key Specifications:
| Step-Down Switching Regulators |
| Part Number |
VIN
(V) |
VIN
(V) |
VOUT
(V) |
VOUT
(V) |
Max. IOUT
(A) |
Max. IOUT
(A) |
Output Adjust. Method |
DC-DC Outputs |
Oper. Freq.
(kHz) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
min |
max |
≥ |
≤ |
max w/pins |
See Notes |
| MAX750A |
4 |
11 |
1.25 |
11 |
0.45 |
0.45 |
Resistor |
1 |
190 |
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30.9 |
$2.39 @1k |
| MAX758A |
16 |
16 |
0.75 |
0.75 |
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81.9 |
$2.75 @1k |
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See All Step-Down Switching Regulators (284)
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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 prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
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Information Index
Document Ref.: 19-0195
Rev 0;
1993-10-01
This page last modified: 2007-05-30
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