LM26003MHX/NOPB National Semiconductor, LM26003MHX/NOPB Datasheet - Page 2

• Manufacturer Part Number: LM26003MHX/NOPB
• Description: IC REG BUCK SW 3A 20-TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Step-Down (Buck)r

Specifications of LM26003MHX/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 35 V
• Current - Output: 3A
• Frequency - Switching: 150kHz ~ 500kHz
• Voltage - Input: 4 ~ 38 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Power - Output: 3.1W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM26003MHX

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Connection Diagram
Ordering Information
*Automotive Grade (Q) product incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies.
Reliability qualification is compliant with the requirements and temperature grades defined in the AEC-Q100 standard. Automotive grade products are identified
with the letter Q. For more information go to http://www.national.com/automotive.
Pin Descriptions
LM26003QMHX
Order Number
Pin #
LM26003QMH
LM26003MHX
LM26003MH
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
Pin Name
PGOOD
COMP
FPWM
VBIAS
AGND
PGND
FREQ
SYNC
AVIN
VIN
VIN
VIN
EN
SS
FB
TSSOP-20EXP
TSSOP-20EXP
Package Type
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.
Package
Drawing
MXA20A
MXA20A
20-Lead Exposed Pad TSSOP Package
Package Marking
LM26003QMH
LM26003QMH
LM26003MH
LM26003MH
Top View
2
2500 Units in Tape and Reel
2500 Units in Tape and Reel
73 Units in Rail
73 Units in Rail
Supplied As
30067602
qualified. Automotive
AEC-Q100 Grade 1
Grade Production
Features
Flow*