Step-Down Controller. TPS51218 Datasheet

TPS51218 Controller. Datasheet pdf. Equivalent

Part TPS51218
Description Single Synchronous Step-Down Controller
Feature TPS51218 www.ti.com SLUS935B – MAY 2009 – REVISED FEBRUARY 2012 HIGH PERFORMANCE, SINGLE SYNCHRONO.
Manufacture etcTI
Datasheet
Download TPS51218 Datasheet



TPS51218
TPS51218
www.ti.com
SLUS935B MAY 2009 REVISED FEBRUARY 2012
HIGH PERFORMANCE, SINGLE SYNCHRONOUS STEP-DOWN
CONTROLLER FOR NOTEBOOK POWER SUPPLY
Check for Samples: TPS51218
FEATURES
1
2 Wide Input Voltage Range: 3 V to 28 V
Output Voltage Range: 0.7 V to 2.6 V
Wide Output Load Range: 0 to 20A+
Built-in 0.5% 0.7 V Reference
D-CAPMode with 100-ns Load Step
Response
Adaptive On Time Control Architecture With 4
Selectable Frequency Setting
4700 ppm/°C RDS(on) Current Sensing
Internal 1-ms Voltage Servo Softstart
Pre-Charged Start-up Capability
Built in Output Discharge
Power Good Output
Integrated Boost Switch
Built-in OVP/UVP/OCP
Thermal Shutdown (Non-latch)
SON-10 (DSC) Package
APPLICATIONS
Notebook Computers
I/O Supplies
System Power Supplies
DESCRIPTION
The TPS51218 is a small-sized single buck controller
with adaptive on-time D-CAPmode. The device is
suitable for low output voltage, high current, PC
system power rail and similar point-of-load (POL)
power supply in digital consumer products. A small
package with minimal pin-count saves space on the
PCB, while a dedicated EN pin and pre-set frequency
selections minimize design effort required for new
designs. The skip-mode at light load condition, strong
gate drivers and low-side FET RDS(on) current sensing
supports low-loss and high efficiency, over a broad
load range. The conversion input voltage which is the
high-side FET drain voltage ranges from 3 V to 28 V
and the output voltage ranges from 0.7 V to 2.6 V.
The device requires an external 5-V supply. The
TPS51218 is available in a 10-pin SON package
specified from 40°C to 85°C.
TYPICAL APPLICATION CIRCUIT
V5IN
VIN
TPS51218
1 PGOOD VBST 10
2 TRIP
DRVH 9
EN
3 EN
SW 8
4 VFB
V5IN 7
5 RF
DRVL 6
GND
VOUT
VOUT_GND
UDG-09064
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.
D-CAP 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 © 20092012, Texas Instruments Incorporated



TPS51218
TPS51218
SLUS935B MAY 2009 REVISED FEBRUARY 2012
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
TA
40°C to 85°C
ORDERING INFORMATION
PACKAGE
ORDERING DEVICE
NUMBER
PINS
TPS51218DSCR
10
Plastic SON PowerPAD
TPS51218DSCT
10
OUTPUT
SUPPLY
Tape and reel
Mini reel
MINIMUM
QUANTITY
3000
250
ABSOLUTE MAXIMUM RATINGS(1)
over operating free-air temperature range (unless otherwise noted)
VALUE
UNIT
Input voltage range(2)
VBST
VBST (3)
SW
0.3 to 37
0.3 to 7
V
5 to 30
V5IN, EN, TRIP, VFB, RF
0.3 to 7
Output voltage range(2)
DRVH
DRVH (3)
DRVH(3), pulse width < 20 ns
DRVL
5 to 37
0.3 to 7
2.5 to 7
V
0.5 to 7
DRVL, pulse width < 20 ns
2.5 to 7
PGOOD
0.3 to 7
TJ
TSTG
Junction temperature range
Storage temperature range
150
°C
55 to 150
°C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to the network ground terminal unless otherwise noted.
(3) Voltage values are with respect to the SW terminal.
DISSIPATION RATINGS
2-oz. trace and copper pad with solder.
PACKAGE
10-pin DSC(1)
TA < 25°C
POWER RATING
1.54 W
DERATING FACTOR
ABOVE TA = 25°C
15 mW/°C
TA = 85°C
POWER RATING
0.62 W
(1) Enhanced thermal conductance by thermal vias is used beneath thermal pad as shown in Land Pattern information.
2
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Product Folder Link(s): TPS51218
Copyright © 20092012, Texas Instruments Incorporated





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