LM2767M5 National Semiconductor, LM2767M5 Datasheet

Power Supply IC

LM2767M5

Manufacturer Part Number
LM2767M5
Description
Power Supply IC
Manufacturer
National Semiconductor
Datasheet

Specifications of LM2767M5

Output Current
15A
No. Of Pins
5
Peak Reflow Compatible (260 C)
No
Frequency
11000Hz
Supply Voltage
5.50 V
Supply Voltage Max
5.50V
Leaded Process Compatible
No
Package / Case
5-SOT-23
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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© 2000 National Semiconductor Corporation
Note 1: The small physical size of the SOT-23 package does not allow for the full part number marking. Devices will be marked with the designation shown in
the column Package Marking.
LM2767
Switched Capacitor Voltage Converter
General Description
The LM2767 CMOS charge-pump voltage converter oper-
ates as a voltage doubler for an input voltage in the range of
+1.8V to +5.5V. Two low cost capacitors and a diode are
used in this circuit to provide at least 15 mA of output current.
The LM2767 operates at 11 kHz switching frequency to
avoid audio voice-band interference. With an operating cur-
rent of only 40 µA (operating efficiency greater than 90% with
most loads), the LM2767 provides ideal performance for bat-
tery powered systems. The device is manufactured in a
SOT23-5 package.
Basic Application Circuit
Ordering Information
Order Number
LM2767M5X
LM2767M5
Package
Number
MA05B
MA05B
DS101274
S17B (Note 1)
S17B (Note 1)
Package
Marking
Voltage Doubler
Features
n Doubles Input Supply Voltage
n SOT23-5 Package
n 20
n 96% Typical Conversion Efficiency at 15mA
Applications
n Cellular Phones
n Pagers
n PDAs, Organizers
n Operational Amplifier Power Suppliers
n Interface Power Suppliers
n Handheld Instruments
Tape and Reel (1000 units/reel)
Tape and Reel (3000 units/reel)
Typical Output Impedance
Supplied as
DS101274-1
February 2000
www.national.com

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LM2767M5 Summary of contents

Page 1

... Order Number Package Number LM2767M5 MA05B LM2767M5X MA05B Note 1: The small physical size of the SOT-23 package does not allow for the full part number marking. Devices will be marked with the designation shown in the column Package Marking. © 2000 National Semiconductor Corporation ...

Page 2

Connection Diagram DS101274-13 Top View With Package Marking Pin Description Pin www.national.com 5-Lead SOT (M5) Name V Positive voltage output. OUT GND Power supply ground input. CAP− Connect this pin to the negative terminal of ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (V+ to GND Continuous Output Current OUT Output Short-Circuit Duration to GND (Note 3) Continuous Power = 25˚C)(Note 4) Dissipation ( (Note 4) JMax Electrical Characteristics ...

Page 4

Test Circuit Typical Performance Characteristics specified) Supply Current vs Supply Voltage Output Resistance vs Supply Voltage www.national.com FIGURE 1. LM2767 Test Circuit (Circuit of Figure 1, V Output Resistance vs Capacitance DS101274-4 Output Resistance vs Temperature DS101274-6 4 DS101274-3 = ...

Page 5

Typical Performance Characteristics specified) (Continued) Output Voltage vs Load Current Switching Frequency vs Supply Voltage Output Ripple vs Load Current (Circuit of Figure 1, V Efficiency vs Load Current DS101274-8 Switching Frequency vs Temperature DS101274-10 DS101274- 5V, T ...

Page 6

Circuit Description The LM2767 contains four large CMOS switches which are switched in a sequence to double the input supply voltage. Energy transfer and storage are provided by external capaci- tors. Figure 2 illustrates the voltage conversion scheme. When S ...

Page 7

Other Applications Paralleling Devices Any number of LM2767s can be paralleled to reduce the out- put resistance. Since there is no closed loop feedback, as found in regulated circuits, stable operation is assured. Each device must have its own pumping ...

Page 8

Other Applications (Continued) FIGURE 5. Generate a Regulated +5V from +3V Input Voltage www.national.com 8 DS101274-21 ...

Page 9

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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