lm26001bmhx National Semiconductor Corporation, lm26001bmhx Datasheet - Page 2

• Manufacturer Part Number: lm26001bmhx
• Description: 1.5a Switching Regulator With High Efficiency Sleep Mode
• Manufacturer: National Semiconductor Corporation

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Connection Diagram
Ordering Information
Pin Descriptions
Pin #
EP
10
11
12
13
14
15
16
LM26001MXAX
Order Number
1
2
3
4
5
6
7
8
9
LM26001MXA
Pin Name
PGOOD
COMP
FPWM
VBIAS
BOOT
FREQ
SYNC
GND
VDD
VIN
VIN
SW
SW
EN
SS
FB
EP
TSSOP-16EXP
TSSOP-16EXP
Package Type
Power supply input
Power supply input
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.
Ground
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 0.1µF 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.
Exposed Pad thermal connection. Connect to GND.
Package Drawing
16-Lead Plastic TSSOP
MXA16A
MXA16A
Top View
2
Package Marking
Description
LM26001EM
LM26001EM
20179402
2500 Units of Tape and Reel
92 Units of Rail
Supplied As