Datasheet MAX1951 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators |
| Pages / Page | 15 / 1 — 1MHz, All-Ceramic, 2.6V to 5.5V Input,. 2A PWM Step-Down DC-to-DC … |
| File Format / Size | PDF / 383 Kb |
| Document Language | English |
1MHz, All-Ceramic, 2.6V to 5.5V Input,. 2A PWM Step-Down DC-to-DC Regulators. MAX1951/MAX1952. General Description. Features
Model Line for this Datasheet
Text Version of Document
19-2622; Rev 2; 6/09
1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators MAX1951/MAX1952 General Description Features
The MAX1951/MAX1952 high-efficiency, DC-to-DC ♦
Compact 0.385in2 Circuit Footprint
step-down switching regulators deliver up to 2A of out- put current. The devices operate from an input voltage ♦
10µF Ceramic Input and Output Capacitors, 2µH
range of 2.6V to 5.5V and provide an output voltage
Inductor for 1.5A Output
from 0.8V to VIN, making the MAX1951/MAX1952 ideal ♦
Efficiency Up to 94%
for on-board postregulation applications. The MAX1951 total output error is less than 1% over load, line, and ♦
1% Output Accuracy Over Load, Line, and
temperature.
Temperature (MAX1951, Up to 1.5A)
The MAX1951/MAX1952 operate at a fixed frequency of ♦
Guaranteed 2A Output Current
1MHz with an efficiency of up to 94%. The high operating frequency minimizes the size of external components. ♦
Operate from 2.6V to 5.5V Supply
Internal soft-start control circuitry reduces inrush current. ♦
Adjustable Output from 0.8V to VIN (MAX1951)
Short-circuit and thermal-overload protection improve design reliability. ♦
Preset Output of 1.8V (1.5% Accuracy) (MAX1952)
The MAX1951 provides an adjustable output from 0.8V ♦
Internal Digital Soft-Soft
to VIN, whereas the MAX1952 has a preset output of 1.8V. Both devices are available in a space-saving 8-pin ♦
Short-Circuit and Thermal-Overload Protection
SO package.
Applications Ordering Information/
ASIC/DSP/µP/FPGA Core and I/O Voltages
Selector Guide
Set-Top Boxes
PIN- PART TEMP RANGE OUTPUT
Cellular Base Stations
PACKAGE
Networking and Telecommunications
MAX1951
ESA+ -40°C to +85°C 8 SO Adj 0.8V to VIN
MAX1952
ESA+ -40°C to +85°C 8 SO Fixed 1.8V +Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration Typical Operating Circuit
OUTPUT INPUT 0.8V TO V TOP VIEW IN, UP TO 2A 2.6V TO 5.5V IN LX VCC 1 8 IN MAX1951 FB VCC REF 2 7 LX MAX1951 GND 3 MAX1952 6 PGND COMP REF FB 4 5 COMP OFF PGND GND ON
SO
OPTIONAL
________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators MAX1951/MAX1952 General Description Features
The MAX1951/MAX1952 high-efficiency, DC-to-DC ♦
Compact 0.385in2 Circuit Footprint
step-down switching regulators deliver up to 2A of out- put current. The devices operate from an input voltage ♦
10µF Ceramic Input and Output Capacitors, 2µH
range of 2.6V to 5.5V and provide an output voltage
Inductor for 1.5A Output
from 0.8V to VIN, making the MAX1951/MAX1952 ideal ♦
Efficiency Up to 94%
for on-board postregulation applications. The MAX1951 total output error is less than 1% over load, line, and ♦
1% Output Accuracy Over Load, Line, and
temperature.
Temperature (MAX1951, Up to 1.5A)
The MAX1951/MAX1952 operate at a fixed frequency of ♦
Guaranteed 2A Output Current
1MHz with an efficiency of up to 94%. The high operating frequency minimizes the size of external components. ♦
Operate from 2.6V to 5.5V Supply
Internal soft-start control circuitry reduces inrush current. ♦
Adjustable Output from 0.8V to VIN (MAX1951)
Short-circuit and thermal-overload protection improve design reliability. ♦
Preset Output of 1.8V (1.5% Accuracy) (MAX1952)
The MAX1951 provides an adjustable output from 0.8V ♦
Internal Digital Soft-Soft
to VIN, whereas the MAX1952 has a preset output of 1.8V. Both devices are available in a space-saving 8-pin ♦
Short-Circuit and Thermal-Overload Protection
SO package.
Applications Ordering Information/
ASIC/DSP/µP/FPGA Core and I/O Voltages
Selector Guide
Set-Top Boxes
PIN- PART TEMP RANGE OUTPUT
Cellular Base Stations
PACKAGE
Networking and Telecommunications
MAX1951
ESA+ -40°C to +85°C 8 SO Adj 0.8V to VIN
MAX1952
ESA+ -40°C to +85°C 8 SO Fixed 1.8V +Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration Typical Operating Circuit
OUTPUT INPUT 0.8V TO V TOP VIEW IN, UP TO 2A 2.6V TO 5.5V IN LX VCC 1 8 IN MAX1951 FB VCC REF 2 7 LX MAX1951 GND 3 MAX1952 6 PGND COMP REF FB 4 5 COMP OFF PGND GND ON
SO
OPTIONAL
________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
