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| 型号： | TPS51727RHATG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封装： | 6 X 6 MM, GREEN, PLASTIC, QFN-40 |
| 文件页数： | 39/42页 |
| 文件大小： | 0K |
| 代理商： | TPS51727RHATG4 |
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SLUS806B – APRIL 2008 – REVISED JANUARY 2009 ..................................................................................................................................................... www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
over recommended free-air temperature range, V5IN = V5FILT = 5.0 V GFB = PGND = GND, VFB = VOUT (Unless otherwise
noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
TIMERS: SLEW RATE, ISLEW, ON-TIME AND I/O TIMING
ISLEW 1
RSLEW to GND Current
RSLEW = 125 k from ISLEW to GND
9.90
10.00
10.15
A
ISLEW 2
RSLEW to VREF Current
RSLEW = 45 k from VREF to ISLEW
9.5
10.2
10.8
A
ISLEW = |10 A|, EN goes ‘HI’ (soft-start), VID Slew, Non-OVP
SLSTRT
VFB VID Change Slew Rate
9
13
16
mV/
s
Fault = Soft-stop
Time from VVFB out of +200 mV VDAC boundary to PGOOD
TPGDDGLTO
PGOOD Deglitch Time
40
74
100
s
low
Time from VVFB out of –300 mV VDAC boundary to PGOOD
TPGDDGLTU
PGOOD Deglitch Time
50
105
150
s
low
VTON = GND, VLLx = 12 V, VVFB = 1 V
285
370
460
VTON = REF, VLLx = 12 V, VVFB = 1 V
200
250
300
TTON
On-Time Control
ns
VTON = 3.3V, VLLx = 12 V, VVFB = 1 V
160
195
230
VTON = V5FILT, VLLx = 12 V, VFB = 1
140
170
200
TMIN
Controller Minimum OFF time
Fixed Value
95
129
155
ns
TVIDDBNC
VID Debounce Time (2)
100
ns
TPCNTBNC
PCNT Debounce Time(2)
100
ns
TVCCVID
VID Change to VFB Change(2)
1500
ns
TENPGD
EN Low to PGOOD Low
20
74
100
ns
TPGDVCC
PGOOD Low to VFB Change(2)
100
ns
TTHALDGLT
THAL Deglitch Time
0.7
1.1
3.0
ms
RSFTSTP
Soft-stop Transitor Resistance
600
850
1100
PROTECTION: OVP, UVP, PGOOD, THAL, "FAULTS OFF" AND INTERNAL THRMAL SHUTDOWN
VOVPH
Fixed OVP Voltage
VVFB > VOVPH for 1 s, DRVL turns ON
1.65
1.70
1.75
V
Measured at the VFB pin wrt / VID code. Device latches OFF,
VPGDH
PGOOD High Threshold
180
220
255
mV
begins soft-stop
Measured at the VFB pin wrt / VID code. IC latches off,
VPGDL
PGOOD Low Threshold
–365
–325
–285
mV
begins soft-stop
VTHRM
Thermal Alarm Voltage
Measured at THRM; THAL goes LO
0.72
0.75
0.82
V
ITHRM
THRM Current
Measure ITHRM to GND
57
61
67
A
VNOFLT
All Faults OFF
VTHRM > (VV5FILT + VTH); not latched
4.75
4.90
5.00
V
THINT
Not final tested. Latch off controller, attempt soft-stop
160
°C
Internal Controller Thermal Shutdown(2)
Not final tested. Controller starts again after temperature has
THHYS
Thermal Shutdown Hysteresis(2)
10
°C
dropped
LOGIC PINS: I/O VOLTAGE AND CURRENT
VTHALL
THAL Pull Down Voltage
Pull down voltage with 20-mA sink current
0.15
0.4
V
ITHALLK
THAL Leakage Current
Hi-Z Leakage Current, Apply 5-V in off state
–2.0
0.2
2.0
A
VPGL
PGOOD Pull Down Voltage
Pull down voltage with 3-mA sink current
0.1
0.4
V
IPGLK
PGOOD Leakage Current
Hi-Z Leakage Current, Apply 5 V in off state
–2.0
0.1
2.0
A
VLV_H
LV I/O Logic High
PCNT, VID0, VID1, VID2, VID3, VID4
0.6
0.7
V
VLV_L
LV I/O Logic Low
PCNT, VID0, VID1, VID2, VID3, VID4
0.3
0.4
V
Leakage current, VVID = VPCNT = 1.0 V, VSLP = 3.3 V, VEN = 0
ILV_LK
LV I/O Leakage
–1.0
0.01
1.0
A
V
IVIDLK
LV I/O Leakage
Leakage current, VVID = VPCNT = 1.0 V, VEN = 3.3 V
5
10
15
A
VV3P3H
I/O 3.3 V Logic High
EN, SLP
1.3
2.3
V
VV3P3L
I/O 3.3 V Logic Low
EN, SLP
0.8
1.1
V
IENH
I/O 3.3 V Leakage
Leakage current, VEN = 3.3 V
10.0
25.0
A
ISLPH
I/O 3.3 V Leakage
Leakage current, VEN = 3.3 V; VSLP = 3.3 V
20.0
45.0
A
IVIDL
VVID0 = VVID1 = VVID2 = VVID3 = VVID4 = 0 V, VEN = 3.3 V
–3
–1.5
1
A
IDACS
VDACS = 5 V, VEN = 3.3 V
25
75
A
ISELECT
VTRIPSEL = VOSRSEL = VTONSEL = 5 V
–2
1.5
5
A
(2)
Ensured by design. Not production tested.
6
Copyright 2008–2009, Texas Instruments Incorporated
Product Folder Link(s): TPS51727
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