DC/DC Regulator. LM2842 Datasheet

LM2842 Regulator. Datasheet pdf. Equivalent

Part LM2842
Description 100/300/600 mA Input Step-Down DC/DC Regulator
Feature LM2840/LM2841/LM2842/LM2840Q/LM2841Q/LM2842Q 100 / 300 / 600 mA Input Step-Down DC/ DC Regulator in .
Manufacture National Semiconductor Corporation
Total Page 15 Pages
Datasheet
Download LM2842 Datasheet



LM2842
LM2840/LM2841/LM2842/
LM2840Q/LM2841Q/
LM2842Q
August 23, 2011
100/300/600 mA Input Step-Down DC/DC Regulator in Thin
SOT-23
General Description
The LM2840, LM2841 and LM2842 are PWM DC/DC buck
(step-down) regulators. With a wide input range from
4.5V-42V, they are suitable for a wide range of applications
such as power conditioning from unregulated sources. They
feature a low RDSON (0.9Ω typical) internal switch for maxi-
mum efficiency (85% typical). Operating frequency is fixed at
550 kHz (X version) and 1.25 MHz (Y version) allowing the
use of small external components while still being able to have
low output voltage ripple. Soft-start can be implemented using
the shutdown pin with an external RC circuit allowing the user
to tailor the soft-start time to a specific application.
The LM2840 is optimized for up to 100 mA, the LM2841 for
300 mA and the LM2842 is optimized for up to 600 mA load
currents. They all have a 0.765V nominal feedback voltage.
Additional features include: thermal shutdown, VIN under-volt-
age lockout, and gate drive under-voltage lockout. The
LM2840, LM2841 and LM2842 are available in a low profile
TSOT-6L package.
Features
LM2840Q, LM2841Q and LM2842Q are Automotive
Grade products that are AEC-Q100 grade 1 qualified (-40°
C to +125°C operating junction temperature)
Input voltage range of 4.5V to 42V
Output current options of 100 mA, 300 mA and 600 mA
Feedback pin voltage of 0.765V
550 kHz (X) or 1.25 MHz (Y) switching frequency
Low shutdown IQ, 16 µA typical
Short circuit protected
Internally compensated
Soft-start circuitry
Small overall solution size (TSOT-6L package)
Applications
Battery powered equipment
Industrial distributed power applications
Portable media players
Portable hand held instruments
Typical Application Circuit
© 2011 National Semiconductor Corporation 300367
30036702
www.national.com



LM2842
Connection Diagram
Top View
30036704
TSOT 6 Lead
NS Package Number MK06A
Ordering Information
Order Number
LM2840XMK-ADJL
LM2840XMKX-ADJL
LM2840YMK-ADJL
LM2840YMKX-ADJL
LM2841XMK-ADJL
LM2841XMKX-ADJL
LM2841YMK-ADJL
LM2841YMKX-ADJL
LM2842XMK-ADJL
LM2842XMKX-ADJL
LM2842YMK-ADJL
LM2842YMKX-ADJL
LM2840XQMK
LM2840XQMKX
LM2840YQMK
LM2840YQMKX
LM2841XQMK
LM2841XQMKX
LM2841YQMK
LM2841YQMKX
LM2842XQMK
LM2842XQMKX
LM2842YQMK
LM2842YQMKX
Spec.
NOPB
Package
Type
NSC
Package
Drawing
Top Mark
SE8B
SF1B
STFB
STTB
STVB
TSOT-6 MK06A
STXB
SE9B
SF2B
SB1B
SB2B
SB3B
SB4B
Supplied As
Feature
1000 Units, Tape and Reel
3000 Units, Tape and Reel
1000 Units, Tape and Reel
3000 Units, Tape and Reel
1000 Units, Tape and Reel
3000 Units, Tape and Reel
1000 Units, Tape and Reel
3000 Units, Tape and Reel
1000 Units, Tape and Reel
3000 Units, Tape and Reel
1000 Units, Tape and Reel
3000 Units, Tape and Reel
1000 Units, Tape and Reel
3000 Units, Tape and Reel
1000 Units, Tape and Reel
3000 Units, Tape and Reel
1000 Units, Tape and Reel
3000 Units, Tape and Reel
1000 Units, Tape and Reel
3000 Units, Tape and Reel
1000 Units, Tape and Reel
3000 Units, Tape and Reel
1000 Units, Tape and Reel
3000 Units, Tape and Reel
AEC-Q100 Grade 1
qualified. Automotive
Grade Production
Flow*
*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.
www.national.com
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