LM26003MH NSC [National Semiconductor], LM26003MH Datasheet - Page 2

• Manufacturer Part Number: LM26003MH
• Description: 3A Switching Regulator with High Efficiency Sleep Mode
• Manufacturer: NSC [National Semiconductor]

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Connection Diagram
Ordering Information
Pin Descriptions
Pin #
Order Number
EP
10
11
12
13
14
15
16
17
18
19
20
LM26003MHX
1
2
3
4
5
6
7
8
9
LM26003MH
Pin Name
PGOOD
COMP
FPWM
VBIAS
AGND
PGND
BOOT
FREQ
SYNC
AVIN
VDD
VIN
VIN
VIN
SW
SW
SW
EN
SS
EP
FB
Description
Power supply input for high side FET
Power supply input for high side FET
Power supply input for high side FET
Power supply input for IC supply
Power Good pin. An open drain output which goes high when the output voltage is greater than 92% of
nominal.
Enable is an analog level input pin. When pulled below 0.8V, the device enters shutdown mode.
Soft-start pin. Connect a capacitor from this pin to GND to set the soft-start time.
Compensation pin. Connect to a resistor capacitor pair to compensate the control loop.
Feedback pin. Connect to a resistor divider between VOUT and GND to set output voltage.
Analog GND as IC reference
Power GND is GND for the switching stage of the regulator
Frequency adjust pin. Connect a resistor from this pin to GND to set the operating frequency.
FPWM is a logic level input pin. For normal operation, connect to GND. When pulled high, sleep mode
operation is disabled.
Frequency synchronization pin. Connect to an external clock signal for synchronized operation. SYNC
must be pulled low for non-synchronized operation.
Connect to an external 3V or greater supply to bypass the internal regulator for improved efficiency. If not
used, VBIAS should be tied to GND.
The output of the internal regulator. Bypass with a minimum 1.0 µF capacitor.
Bootstrap capacitor pin. Connect a 0.1 µF minimum ceramic capacitor from this pin to SW to generate
the gate drive bootstrap voltage.
Switch pin. The source of the internal N-channel switch.
Switch pin. The source of the internal N-channel switch.
Switch pin. The source of the internal N-channel switch.
Exposed Pad thermal connection. Connect to GND.
TSSOP-20EXP
Package Type
20-Lead Exposed Pad TSSOP Package
Package Drawing
MXA20A
Top View
2
Package Marking
LM26003MH
LM26003MH
30067602
2500 Units in Tape and Reel
73 Units in Rail
Supplied As