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TPS51640A Datasheet(PDF) 6 Page - Texas Instruments

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No. de pieza TPS51640A
Descripción Electrónicos  Dual-Channel (3-Phase CPU/1-Phase GPU) SVID, D-CAP??Step-Down Controller for
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

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TPS51640A, TPS59640, TPS59641
SLUSAQ2
– JANUARY 2012
www.ti.com
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
VBOOT > 0 V, SLEWRATE = 12 mV/µs, no faults,
tSTARTUP1
Start-up time
time from VR_ON until the controller responds to
5
ms
SVID commands
SLEWRATE = 12mV/
µs, VR_ON goes ‘HI’,
SLSTRTSTP
xVFB slew soft-start / soft-stop
1.25
1.50
1.75
mV/
µs
VR_ON goes
‘LO = ‘Soft-stop’
VSLEWA
≤ 0.30V (Also disables SVID CLK timer)
10.0
12.0
14.5
VSLEWA = 0.4 V
3.5
4.0
5.0
VSLEWA = 0.6 V
7.5
8.5
9.5
0.75 V
≤ VSLEWA ≤ 0.85 V
10.0
12.0
14.5
SLSET
Slew rate setting
VSLEWA = 1.0 V
16
mV/
µs
VSLEWA = 1.2 V
20
VSLEWA = 1.4 V
23
VSLEWA = 1.6 V
26
VSLEWA ≥ 2.50 V
26
Time from xVFB out of +220 mV VDAC boundary
tPGDDGLTO
xPGOOD deglitch time
5
100
µs
to xPGOOD low.
Time from xVFB out of
–315 mV VDAC boundary
tPGDDGLTU
xPGOOD deglitch time
150
500
µs
to xPGOOD low.
TPS51640A
270
327
375
RCF=20 kΩ, VBAT=12 V, VDAC=1.1 V
TPS59640
(250 kHz)
265
327
380
TPS59641
TPS51640A
225
272
320
RCF=24 kΩ, VBAT=12 V, VDAC=1.1 V
TPS59640
(300 kHz)
220
272
325
TPS59641
TPS51640A
185
235
280
RCF=30 kΩ, VBAT=12 V, VDAC=1.1 V
TPS59640
(350 kHz)
180
235
285
TPS59641
TPS51640A
160
207
252
tTON_CPU
CPU on-time
RCF=39 kΩ, VBAT=12 V, VDAC=1.1 V
ns
TPS59640
(400 kHz)
155
207
262
TPS59641
TPS51640A
140
185
231
RCF=56 kΩ, VBAT=12 V, VDAC=1.1 V
TPS59640
(450 kHz)
134
185
241
TPS59641
TPS51640A
120
167
212
RCF=75 kΩ, VBAT=12 V, VDAC=1.1 V
TPS59640
(500 kHz)
115
167
217
TPS59641
RCF=100 kΩ, VBAT=12 V, VDAC=1.1 V (550 kHz)
109
152
198
RCF=150 kΩ, VBAT=12 V, VDAC=1.1 V (600 kHz)
105
140
177
6
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© 2012, Texas Instruments Incorporated


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