6-astep-downregulator with integrated · pdf filen/c n/c trip en pgood n/c vbst n/c ll ll ll...

N/C
N/C
TRIP
EN
PG
OO
D
N/C
VB
ST
N/C LL
LL
LL
LL
LL
LL
LL
LL
VFB
RF
MODE
VDD
TPS53314
GN
D1
PG
ND
VR
EG
GN
D2
PG
ND
PG
ND
PG
ND
PG
ND
PG
ND
PG
ND
VIN
VIN
LL
LL
LL
LL
LL
VIN
VIN
VIN
1 2 3 4 5 6 7 8 9 10 11 12
20
19
18
17
16
15
14
13
32 31 30 29 28 27 26 25 24 23 22 21
33
34
35
36
37
38
39
40
EN
VOUT
VIN
3 V to 15 V
UDG-11138
VDD
4.5 V to 25 V
PGOODVREG
Pad
TPS53314
www.ti.com SLUSAK3 MAY 2011
6-A Step-Down Regulator with Integrated SwitcherCheck for Samples: TPS53314
1FEATURES APPLICATIONS2 Conversion Input Voltage Range: 3 V to 15 V Server and Desktop Computers VDD Input Voltage Range: 4.5 V to 25 V Notebook Computers Output Voltage Range: 0.6 V to 5.5 V Telecommunication Equipments 5-V LDO Output
DESCRIPTION Integrated Power MOSFETs with 6-ATPS53314 is a D-CAP mode, 6-A synchronousContinuous Output Currentswitcher with integrated MOSFETs. It is designed for

TPS53314
SLUSAK3 MAY 2011 www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foamduring storage or handling to prevent electrostatic damage to the MOS gates.
ORDERING INFORMATION (1)
ORDERING TRANSPORT MINIMUMTA PACKAGE PINS ECO PLANNUMBER MEDIA QUANTITY
TPS53314RGFR 40 Tape and reel 3000Plastic QFN Green (RoHS and40C to 85C (RGF) no Pb/Br)TPS53314RGFT 40 Mini reel 250
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TIweb site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS (1)
VALUE UNIT
VIN (main supply) 0.3 to 17
VDD 0.3 to 28
Input voltage range VBST 0.3 to 24 V
VBST(with respect to LL) 0.3 to 7
EN, TRIP, VFB, RF, MODE 0.3 to 7
DC 1 to 23LL
Pulse < 20 ns, E = 5 J 7Output voltage range V
PGOOD, VREG 0.3 to 7
PGND 0.3 to 0.3
Source/Sink Current VBST 50 mA
Operating free-air temperature, TA 40 to 85 C
Storage temperature range, Tstg 55 to 150 C
Junction temperature range, TJ 40 to 150 C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 300 C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratingsonly and functional operation of the device at these or any other conditions beyond those indicated under recommended operatingconditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
THERMAL INFORMATIONTPS53314
THERMAL METRIC (1) UNITSRGF(40 PINS)
JA Junction-to-ambient thermal resistance 35.8JCtop Junction-to-case (top) thermal resistance 23.8JB Junction-to-board thermal resistance 10.1 C/WJT Junction-to-top characterization parameter 0.4JB Junction-to-board characterization parameter 10.0JCbot Junction-to-case (bottom) thermal resistance 2.8
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
2 Copyright 2011, Texas Instruments Incorporated
http://focus.ti.com/docs/prod/folders/print/tps53314.htmlhttp://www.ti.comhttp://www.ti.comhttp://www.ti.com/lit/pdf/spra953

TPS53314
RECOMMENDED OPERATING CONDITIONSVALUE UNIT
VIN (main supply) 3 to 15
VDD 4.5 to 25
Input voltage range VBST 4.5 to 21 V
VBST(with respect to LL) 4.5 to 6.5
EN, TRIP, VFB, RF, MODE 0.1 to 6.5
LL 0.8 to 15Output voltage range V
PGOOD, VREG 0.1 to 6.5
Source/Sink Current VBST 50 mA
Junction temperature range, TJ 40 to 125 C
Copyright 2011, Texas Instruments Incorporated 3
http://focus.ti.com/docs/prod/folders/print/tps53314.htmlhttp://www.ti.com

TPS53314
ELECTRICAL CHARACTERISTICSOver recommended free-air temperature range, VDD = 12 V (Unless otherwise noted)
PARAMETER CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE AND SUPPLY CURRENT
VIN pin power conversion inputVVIN 3 15 Vvoltage
VDD Supply input voltage 4.5 25 V
IVIN(leak) VIN pin leakage current VEN = 0 V 1 AVDD current, TA = 25C, No Load, VEN = 5 V,IVDD VDD supply current 420 590 AVVFB = 0.630 V
IVDDSDN VDD shutdown current VDD current, TA = 25C, No Load, VEN = 0 V 10 AINTERNAL REFERENCE VOLTAGE
VFB voltage, CCM condition (1) 0.6000 V
TA = 25C 0.597 0.600 0.603VVFB VFB regulation voltage
TA = 0C to 85C 0.5952 0.600 0.6048 VTA = -40C to 85C 0.594 0.600 0.606
IVFB VFB input current VVFB = 0.630 V, TA = 25C 0.002 0.2 ALDO OUTPUT
VVREG LDO output voltage 0 mA IVREG 30 mA 4.77 5.0 5.35 VIVREG LDO output current
(1) Maximum current allowed from LDO 30 mA
VDO LDO drop out voltage VDD = 4.5 V, IVREG = 30 mA 295 mV
BOOT STRAP SWITCH
VFBST Forward voltage VVREG-VBST, IF = 10 mA, TA = 25C 0.1 0.2 VIVBSTLK VBST leakage current VVBST = 23 V, VLL = 17 V, TA = 25C 0.01 1.5 ADUTY AND FREQUENCY CONTROL
tOFF(min) Minimum off time TA = 25C 150 260 400nsVVIN = 17 V, VOUT = 0.6 V, RRF = 0 to VREG,tON(min) Minimum on time 35TA = 25C (1)
SOFTSTART
RMODE = 39 k 0.7RMODE = 100 k 1.4Internal SS time from VOUT = 0 totSS msVOUT = 95% RMODE = 200 k 2.8RMODE = 470 k 5.6
POWERGOOD
PG in from lower 92.5% 96% 98.5%
VTHPG PG threshold PG in from higher 107.5% 110% 112.5%
PG hysteresis 2.5% 5% 7.8%
RPG PG transistor on-resistance 15 30 55 tPGDEL PG Delay after soft-start 0.8 1 1.2 ms
(1) Ensured by design. Not production tested.

TPS53314
ELECTRICAL CHARACTERISTICSOver recommended free-air temperature range, VDD = 12 V (Unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
LOGIC THRESHOLD AND SETTING CONDITIONS
Enable 1.8 VVEN EN voltage threshold
Disable 0.6
IEN EN input current VEN = 5 V 1.0 ARRF = 0 to GND, TA = 25C (1) 200 250 300RRF = 187 k to GND, TA = 25C (1) 250 300 350RRF = 619 k to GND, TA = 25C (1) 350 400 450RRF = Open, TA = 25C (1) 450 500 550
fSW Switching frequency kHzRRF = 866 k to VREG, TA = 25C (1) 580 650 720RRF = 309 k to VREG, TA = 25C (1) 670 750 820RRF = 124 k to VREG, TA = 25C (1) 770 850 930RRF = 0 to VREG, TA = 25C (1) 880 970 1070
PROTECTION: CURRENT SENSE
ITRIP TRIP source current VTRIP = 1 V, TA = 25C 9.4 10.0 10.6 ATCITRIP TRIP current temperature coefficent On the basis of 25C (2) 4700 ppm/CVTRIP Current limit threshold setting range VTRIP-GND voltage 0.2 0.6 V
VTRIP = 0.6 V 67 75 83VOCL Current limit threshold
VTRIP = 0.2 19 26 33mV
VTRIP = 0.6 V 83 75 67VOCLN Negative current limit threshold
VTRIP = 0.2 V 33 26 19Positive 3 15
VAZCADJ Auto zero cross adjustable range mVNegative 15 3
PROTECTION: UVP and OVP
VOVP OVP trip threshold OVP detect 115% 120% 125%
tOVPDEL OVP propagation delay time VFB delay with 50-mV overdrive 1 sVUVP Output UVP trip threshold time UVP detect 65% 70% 75%
tUVPDEL Output UVP propagation delay time 0.8 1 1.2 ms
tUVPEN Output UVP enable delay time from EN to UVP workable, RMODE = 39 k 2.0 2.6 3.2 msUVLO
Wake up 4.00 4.20 4.32VUVVREG VREG UVLO threshold V
Hysteresis 0.25
THERMAL SHUTDOWN
Shutdown temperature (2) 145TSDN Thermal shutdown threshold C
Hysteresis (2) 10
(1) Not production tested. Test condition is VIN = 12 V, VOUT= 1.1 V, IOUT= 5 A using application circuit shown in Figure 33.(2) Ensured by design. Not production tested.
Copyright 2011, Texas Instruments Incorporated 5

SdnVREG
V5OK
LL
TPS53314
tON
One-
Shot
Control
Logic
+
+ OCP
ZC
GND
LL
XCON
PGND
+
1.2 V/0.95 V
EN
UVP/OVP
Logic
+THOK 145C/
135C
+
4.2 V/3.95 V
VIN
VBST
Fault
LL
PGND
RF
++
PWM
+OV
+20%
UV+0.6 V 30%
Delay
SS0.6 V
VFB
TRIP
Enable
+
+
Delay
0.6 V +10/15%
0.6 V 10/15%
PGOOD
Control Logic
On/Off time
Minimum On/Off
Light load
OVP/UVP
FCCM/Skip
UDG-11139
10 ?A
VREG
+
SS
FCCM/
Skip
Decode
MODE
LDO VDD
EN
Ramp
Compensation
+
TPS53314
FUNCTIONAL BLOCK DIAGRAM

N/C
N/C
TRIP
EN
PG
OO
D
N\C
VB
ST
N/C
32 31 30 29 28 27 26 25 24 23 22 21
LL
LL
LL
LL
LL
LL
LL
LL
33
34
35
36
37
38
39
40
VFB
RF
MODE
VDD
1 2 3 4 5 6 7 8 9 10 11 12
20
19
18
17
16
15
14
13
TPS53314
GN
D1
PG

6-astep-downregulator with integrated · pdf filen/c n/c trip en pgood n/c vbst n/c ll ll ll...

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