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MAX730

Maxim
Part Number MAX730
Manufacturer Maxim
Description 5V / Step-Down / Current-Mode PWM DC-DC Converters
Published May 2, 2005
Detailed Description 19-0165; Rev 2; 1/96 5V, Step-Down, Current-Mode PWM DC-DC Converters __________________General Description The MAX730A...
Datasheet PDF File MAX730 PDF File

MAX730
MAX730

Overview
19-0165; Rev 2; 1/96 5V, Step-Down, Current-Mode PWM DC-DC Converters __________________General Description 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 cycleby-cycle current limiting, overcurrent limiting, undervoltage lockout, and programmable soft-start protection.
________________________________Features o 750mA Load Currents (MAX738A/MAX744A) o High-Frequency, Current-Mode PWM o 159kHz to 212.
5kHz Guaranteed Oscillator Frequency Limits (MAX744A) o 85% to 96% Efficiencies o 1.
7mA Quiescent Current o 6µA Shutdown Supply Current o Single Preselected Inductor Value, No Component Design Required o Overcurrent, Soft-Start, and Undervoltage Lockout Protection o Cycle-by-Cycle Current Limiting o 8-Pin DIP/SO Packages (MAX730A) MAX730A/MAX738A/MAX744A _________________Ordering Information PART MAX730ACPA MAX730ACSA MAX730AC/D MAX730AEPA MAX730AESA MAX730AMJA TEMP.
RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C PIN-PACKAGE 8 Plastic DIP 8 SO Dice* 8 Plastic DIP 8 SO 8 CERDIP ___________________________Applic...


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