TPS51640A, TPS59640, TPS59641
SLUSAQ2 –JANUARY 2012
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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
SVID commands
5
ms
SLEWRATE = 12mV/µs, VR_ON goes ‘HI’,
VR_ON goes ‘LO = ‘Soft-stop’
SLSTRTSTP xVFB slew soft-start / soft-stop
1.25
1.50
1.75 mV/µs
VSLEWA ≤ 0.30V (Also disables SVID CLK timer)
VSLEWA = 0.4 V
10.0
3.5
12.0
4.0
8.5
12.0
16
14.5
5.0
VSLEWA = 0.6 V
7.5
9.5
0.75 V ≤ VSLEWA ≤ 0.85 V
VSLEWA = 1.0 V
10.0
14.5
mV/µs
SLSET
Slew rate setting
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
to xPGOOD low.
tPGDDGLTO xPGOOD deglitch time
tPGDDGLTU xPGOOD deglitch time
5
100
µs
µs
Time from xVFB out of –315 mV VDAC boundary
to xPGOOD low.
150
327
327
272
272
235
235
207
207
185
185
167
167
500
375
380
320
325
280
285
252
262
231
241
212
217
TPS51640A
270
265
225
220
185
180
160
155
140
134
120
115
RCF=20 kΩ, VBAT=12 V, VDAC=1.1 V
TPS59640
(250 kHz)
TPS59641
TPS51640A
RCF=24 kΩ, VBAT=12 V, VDAC=1.1 V
TPS59640
(300 kHz)
TPS59641
TPS51640A
RCF=30 kΩ, VBAT=12 V, VDAC=1.1 V
TPS59640
(350 kHz)
TPS59641
TPS51640A
tTON_CPU
CPU on-time
RCF=39 kΩ, VBAT=12 V, VDAC=1.1 V
ns
TPS59640
(400 kHz)
TPS59641
TPS51640A
RCF=56 kΩ, VBAT=12 V, VDAC=1.1 V
TPS59640
(450 kHz)
TPS59641
TPS51640A
RCF=75 kΩ, VBAT=12 V, VDAC=1.1 V
TPS59640
(500 kHz)
TPS59641
RCF=100 kΩ, VBAT=12 V, VDAC=1.1 V (550 kHz)
RCF=150 kΩ, VBAT=12 V, VDAC=1.1 V (600 kHz)
109
105
152
140
198
177
6
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