MAX1970EEE+ by Analog Devices

Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-Down Regulator with POR and RSI/PFO

Status: Active
Series: MAX1970
RoHS: Unknown
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The MAX1970/MAX1971/MAX1972 dual-output current-mode PWM buck regulators operate from 2.6V to 5.5V input and deliver a minimum of 750mA on each output. The MAX1970 and MAX1972 operate at a fixed 1.4MHz (MAX1971 operates at 700kHz) to reduce output inductor and capacitor size and cost. Switching the regulators 180° out-of-phase also reduces the input capacitor size and cost. Ceramic capacitors can be used for input and output. The output voltages are programmable from 1.2V to VIN using external feedback resistors, or can be preset to 1.8V or 3.3V for output 1 and 1.5V or 2.5V for output 2. When one output is higher than 1.2V, the second can be configured down to sub-1V levels. Output accuracy is better than ±1% over variations in load, line, and temperature. Internal soft-start reduces inrush current during startup. All devices feature power-on reset (active-low POR). The MAX1971 includes a reset input (RSI), which forces active-low POR low for 175ms after RSI goes low. The MAX1970 and MAX1972 include an open-drain power-fail output (PFO) that monitors input voltage and goes high when the input falls below 3.94V. For USB-powered xDSL modems, this output can be used to detect USB power failure. A minimum switching frequency of 1.2MHz ensures operation outside the xDSL band. Learn More About PowerMind™

Prices starting from US$12.70


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Features

Current-Mode, 1.4MHz Fixed-Frequency PWM Operation
180° Out-of-Phase Operation Reduces Input Capacitor
±1% Output Accuracy Over Load, Line, and Temperature Ranges
750mA Guaranteed Output Current
2.6V to 5.5V Input
Power-On Reset Delay of 16.6ms (MAX1970) or 175ms (MAX1971 and MAX1972)
Power-Fail Output (MAX1970 and MAX1972 Only)
Power-On Reset Input (MAX1971 Only)
Operation Outside xDSL Band
Ultra-Compact Design with Smallest External Components
Outputs Adjustable from 0.8V to VIN or 1.8V/3.3V and 1.5V/2.5V Preset
All-Ceramic Capacitor Application
Soft-Start Reduces Inrush Current

Specifications

VIN (V) (min) 2.6
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 5
IOUT1 (A) (max) 0.75
Switch Type Internal
Preset VOUT (V) 1.51.82.53.3
Output Adjust. Method PresetResistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 2
Switching Frequency (kHz) 1400
Package/Pins QSOP/16
BudgetaryPrice (See Notes) 7.92


MAX1970EEE+ Semiconductors - ICs by Analog Devices

DC/DC CONV SYNC BUCK 1.4MHZ QSOP-16

Status: Unknown
Series: -
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

Specifications

Input Voltage Min 2.6V
Input Voltage Max 5.5V
No. of Outputs 2 Output, 2Outputs
DC / DC Converter IC Case QSOP
No. of Pins 16Pins
Output Current - Output 1 750mA
Output Current - Output 2 750mA
Output Voltage - Output 1 3.3V
Output Voltage - Output 2 2.5V
Regulator Output Type Fixed Adjustable
Switching Frequency 1.4MHz
Topology Synchronous Buck (Step Down)
Operating Temperature Max 85°C
Product Range -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

DC/DC CONV, SYNC BUCK, 1.4MHZ, QSOP-16 | Farnell
Dc/Dc Conv, Sync Buck, 1.4Mhz, Qsop-16 | Newark Electronics

Frequently Asked Questions

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This part has not been flagged as RoHS Compliant.

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