TPS51640A, TPS59640, TPS59641
www.ti.com
SLUSAQ2 –JANUARY 2012
ELECTRICAL CHARACTERISTICS (continued)
over recommended free-air temperature range, VV5 = VV5DRV = 5.0 V; VV3R3 = 3.3 V; VxGFB = VPGND = VGND, VxVFB = VCORE
(Unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
TIMERS: SLEW RATE, ISLEW, ADDR, ON-TIME AND I/O TIMING (Continued)
TPS51640A
315
310
251
246
215
210
180
175
160
155
347
347
287
287
245
245
216
216
190
190
388
393
330
335
287
292
252
257
223
228
RGF=20 kΩ, VBAT=12 V, VDAC=1.1 V
(275 kHz)
TPS59640
TPS59641
TPS51640A
RGF=24 kΩ, VBAT=12 V, VDAC=1.1V
(330 kHz)
TPS59640
TPS59641
TPS51640A
RGF=30 kΩ, VBAT=12 V, VDAC=1.1 V
(385 kHz)
TPS59640
TPS59641
ns
tTON_GPU
GPU on-time
TPS51640A
RGF=39 kΩ,VBAT=12 V, VDAC=1.1 V
(440 kHz)
TPS59640
TPS59641
TPS51640A
RGF=56 kΩ, VBAT=12 V, VDAC=1.1 V
(495 kHz)
TPS59640
TPS59641
RGF=75 kΩ, VBAT=12 V, VDAC=1.1 V (550 kHz)
RGF=100 kΩ, VBAT=12 V, VDAC=1.1 V (605 kHz)
RGF=150 kΩ, VBAT=12 V, VDAC=1.1 V (660 kHz)
Fixed value
145
120
100
171
156
150
150
210
205
201
200
tMIN
Controller minimum off time
ns
ACK of SetVID-x command to start of voltage
ramp
tVCCVID
VID change to xVFB change(1)
2
µs
tVRONPGD
tPGDVCC
tVRTDGLT
RSFTSTP
VR_ON low to xPGOOD low
xPGOOD low to xVFB change(1)
VR_HOT# deglitch time
20
50
100
100
ns
ns
ms
Ω
0.2
0.7
Soft-stop transistor resistance
Connect to CVFB, GVFB
550
770
1100
PROTECTION: OVP, UVP PGOOD, VR_HOT, ‘FAULTS OFF’ AND INTERNAL THERMAL SHUTDOWN
Fixed OVP voltage threshold
voltage
VOVPH
VPGDH
VPGDL
VCSN1 or VGCSN > VOVPH for 1 µs, DRVL → ON
1.68
190
1.72
220
1.77
245
V
Measured at the xVFB pin wrt/VID code,
device latches OFF
xPGOOD high threshold
mV
mV
Measured at the xVFB pin wrt/VID code,
device latches OFF
xPGOOD low threshold
–348
–315
–280
bit0 of xTHERM register = high
757
651
611
570
531
496
783
680
638
598
559
523
808
707
663
623
583
548
bit1 of xTHERM register also is high
bit2 of xTHERM register also is high
bit3 of xTHERM register also is high
bit4 of xTHERM register also is high
bit5 of xTHERM register also is high
IMVP-7 thermal bit voltage
definition
VTHERM
mV
bit6 of xTHERM register also is high,
ALERT goes low
461
428
488
513
481
bit7 of XTHERM register also is high,
VR_HOT goes low
455
410
CDLx goes low, CDHx goes low
Leakage current
373
425
5
ITHRM
THINT
THERM current
–5
µA
°C
Internal controller thermal
Shutdown(1)
Latch off controller
155
20
Controller thermal SD
hysteresis(1)
THHYS
Cooling required before converter can be reset
°C
(1) Specified by design. Not production tested.
Copyright © 2012, Texas Instruments Incorporated
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