LMR22007 Datasheet, PDF (1/24 Pages) Texas Instruments – LMR22007 2.7V - 20V, 750mA Step-Down Converter with Adjustable Input Current Limit

LMR22007
www.ti.com
SNVS985A – OCTOBER 2013 – REVISED OCTOBER 2013
LMR22007 2.7V - 20V, 750mA Step-Down Converter with Adjustable Input Current Limit
Check for Samples: LMR22007
FEATURES
1
•2 High efficiency
– Greater than 90% at 12 V_IN to 5 V_OUT
• Adjustable input current limit from 150mA to
600mA
• Input voltage range: 2.7V to 20V
• Adjustable output voltage from 0.9V to 5.5V
• Up to 750 mA output current
• Ultra low quiescent current (18µA typical)
• Ultra low shutdown current (300nA typical)
• < +/-2% V_OUT ripple at no load
• < +/-1% V_OUT ripple at full load
• Internal compensation, Soft-start and Thermal
Shutdown
• Solution size less than 26mm²
– Low BOM count with small external
components
• Wafer Chip Scale Package (WCSP)
• Light load power save mode
• Set frequency of 2.1 MHz (typical)
APPLICATIONS
• 3.3V, 5V and 12V Interface
• POL Supply from Single or Multiple Li-Ion
Battery
• Solid-State Disk Drives
• LDO Replacement
• Mobile PC’s, Tablet, Modems, Cameras
DESCRIPTION
The LMR22007 is a switching regulator designed for
the high-efficiency requirement of applications with
stand-by and shut-down modes. The device features
a low-current mode to maintain efficiency under light-
load conditions, and an adaptive on-time control
architecture for fast transient response.
The LMR22007 can deliver up to 750mA of
continuous load current with an adjustable input
current limit. The device has a wide input voltage
range of 2.7V to 20V, and supports V_IN transients to
24V. Other features include internal compensation,
internal soft start, input under-voltage protection,
internal bootstrap diode, and thermal shutdown.
TYPICAL APPLICATION
Vin
4.5 ± 20V
Cin
10µF
Cout
22µF
Vout
3.3V
Rlim
200k
EN
VIN PGND
ILIM
PG
SW
AGND FB VOUTS
L
2.2µH
Rfbb Rfbt
100k 267k
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*
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
DCS-Control is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated