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TPS51285ARUKR датащи(PDF) 6 Page - Texas Instruments

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номер детали TPS51285ARUKR
подробное описание детали  Ultra-Low Quiescent (ULQ?? Dual Synchronous Step-Down Controller with 5V and 3.3V LDOs
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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TPS51285ARUKR датащи(HTML) 6 Page - Texas Instruments

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TPS51285A
TPS51285B
SLVSBX0 – APRIL 2013
www.ti.com
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range, VVIN = 12 V, VVO1 = 5 V, VVFB1 = VVFB2 = 2 V, VEN1 = VEN2 = 3.3 V, VCLK: 200 Ω to
GND
(unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
SUPPLY CURRENT
TA = 25°C, No load, VVO1 = 0 V,
IVIN1
VIN supply current-1
84
μA
VVFB1 = VVFB2 = 2.06V
IVIN2
VIN supply current-2
TA = 25°C, No load, VVFB1 = VVFB2 = 2.06 V
10
μA
IVO1
VO1 supply current
TA = 25°C, No load, VVFB1 = VVFB2 = 2.06 V
70
μA
TPS51285A
25
TA = 25°C, No load, VVO1 = 0 V,
IVIN(STBY)
VIN stand-by current
μA
VEN1= VEN2= 0 V
TPS51285B
28
INTERNAL REFERENCE
TA = 25°C
1.99
2
2.01
V
VFBx
VFB regulation voltage
1.98
2
2.02
V
IFBx
VFB Leakage Current
TA = 25°C
0.1
µA
VREG5 OUTPUT
TA = 25°C, No load, VVO1 = 0 V
4.9
5
5.1
VVIN > 7 V , VVO1= 0 V, IVREG5 < 100 mA
4.85
5
5.1
VVREG5
VREG5 output voltage
V
VVIN > 5.5 V , VVO1= 0 V, IVREG5 < 35 mA
4.85
5
5.1
VVIN > 5 V, VVO1= 0 V, IVREG5 < 20 mA
4.55
4.75
5.1
IVREG5
VREG5 current limit
VVO1 = 0 V, VVREG5= 4.5 V, VVIN = 7 V
100
140
mA
RV5SW
5-V switch resistance
TA = 25°C, VVO1= 5 V, IVREG5= 50 mA
1.8
Ω
VREG3 OUTPUT
VVIN > 7 V , VVO1= 0 V, IVREG3 < 100 mA
3.217
3.3
3.383
VVIN > 5.5 V , VVO1= 0 V, IVREG3 < 35 mA
3.234
3.3
3.366
0°C
≤ TA ≤ 85°C, VVIN > 5.5 V, VVO1= 0 V,
VVREG3
VREG3 output voltage
3.267
3.3
3.333
V
IVREG3 < 35 mA
0°C
≤ TA ≤ 85°C, VVIN > 5.5 V, IVREG3< 35 mA
3.267
3.3
3.333
VVIN > 5 V , VVO1= 0 V, IVREG3 < 35 mA
3.217
3.3
3.366
IVREG3-1
VREG3 current limit-1
VVO1 = 0 V, VVREG3= 3.15 V, VVIN= 7 V
100
200
mA
IVREG3-2
VREG3 current limit-2
VVREG3 = 3.15 V, VVIN= 7 V
100
200
DUTY CYCLE and FREQUENCY CONTROL
fsw1
CH1 frequency(1)
TA = 25°C, VVIN= 20 V
400
kHz
fSW2
CH2 frequency(1)
TA = 25°C, VVIN= 20 V
475
kHz
tOFF(MIN)
Minimum off-time
TA = 25°C
200
300
400
ns
MOSFET DRIVERS
Source, IDRVH = –50 mA, (VVBST – VSW) = 5 V
3
RDRVH
DRVH resistance
Ω
Sink, IDRVH = 50 mA, (VVBST – VSW) = 5 V
1.9
Source, IDRVL = –50 mA, VVREG5 = 5 V
3
RDRVL
DRVL resistance
Ω
Sink, IDRVL = 50 mA, VVREG5= 5 V
0.9
DRVH-off to DRVL-on
12
tD
Dead time
ns
DRVL-off to DRVH-on
20
INTERNAL BOOT STRAP SWITCH
RVBST (ON)
Boost switch on-resistance
TA = 25°C, IVBST = 10 mA
13
Ω
IVBSTLK
VBST leakage current
TA = 25°C
1
µA
CLOCK OUTPUT
VCLK on-resistance (pull-up)
TA = 25°C, VCLK: Open
10
RVCLK
Ω
VCLK on-resistance (pull-down)
TA = 25°C, VCLK: Open
10
fCLK
Clock frequency
TA = 25°C, VCLK: Open
256
kHz
(1)
Specified by design. Not production tested.
6
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Copyright © 2013, Texas Instruments Incorporated
Product Folder Links: TPS51285A TPS51285B


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