LM2621MM National Semiconductor, LM2621MM Datasheet - Page 6

• Manufacturer Part Number: LM2621MM
• Description: IC, STEP-UP DC/DC CONVERTER, 8-SOIC
• Manufacturer: National Semiconductor

Specifications of LM2621MM

• Primary Input Voltage: 14V
• No. Of Outputs: 1
• Output Voltage: 14V
• Output Current: 1A
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Power Dissipation Pd: 500mW
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Typical Performance Characteristics
Detailed Description
OPERATING PRINCIPLE
The LM2621 is designed to provide step-up DC-DC voltage
regulation in battery-powered and low-input voltage sys-
tems. It combines a step-up switching regulator, N-channel
power MOSFET, built-in current limit, thermal limit, and volt-
age reference in a single 8-pin MSOP package . The switch-
ing DC-DC regulator boosts an input voltage between 1.2V
and 14V to a regulated output voltage between 1.24V and
Maximum Load Current vs
Input Voltage
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FIGURE 1. Functional Diagram
6
(Continued)
14V. The LM2621 starts from a low 1.1V input and remains
operational down to 0.65V.
This device is optimized for use in cellular phones and other
applications requiring a small size, low profile, as well as low
quiescent current for maximum battery life during stand-by
and shutdown. A high-efficiency gated-oscillator topology
offers an output of up to 1A.
Additional features include a built-in peak switch current
limit, and thermal protection circuitry.
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