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TPS51225 датащи(PDF) 5 Page - Texas Instruments

номер детали TPS51225
подробное описание детали  Dual Synchronous, Step-Down Controller
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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TPS51225 датащи(HTML) 5 Page - Texas Instruments

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TPS51225, TPS51225B, TPS51225C
www.ti.com
SLUSAV0B – JANUARY 2012 – REVISED SEPTEMBER 2012
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range, VVIN= 12 V, VVO1= 5 V, VVFB1= VVFB2= 2 V, VEN1= VEN2= 3.3 V (unless otherwise
noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
SUPPLY CURRENT
IVIN1
VIN supply current-1
TA = 25°C, No load, VVO1=0 V
860
μA
IVIN2
VIN supply current-2
TA = 25°C, No load
30
μA
IVO1
VO1 supply current
TA = 25°C, No load, VVFB1= VVFB2=2.05 V
900
μA
TA = 25°C, No load, VVO1= 0 V,
TPS51225
IVIN(STBY)
VIN stand-by current
95
μA
TPS51225B
VEN1= VEN2= 0 V
TA = 25°C, No load, VVO1=0 V, VEN1=VEN2=0V
IVIN(STBY)
VIN stand-by current
180
μA
(TPS51225C)
INTERNAL REFERENCE
TA = 25°C
1.99
2.00
2.01
V
VFBx
VFB regulation voltage
1.98
2.00
2.02
V
VREG5 OUTPUT
No load, VVO1= 0 V, TA = 25°C
4.9
5.0
5.1
VVREG5
VREG5 output voltage
VVIN> 7 V , VVO1= 0 V, IVREG5< 100 mA
4.85
5.00
5.10
V
VVIN > 5.5 V , VVO1= 0 V, IVREG5< 35 mA
4.85
5.00
5.10
IVREG5
VREG5 current limit
VVIN= 7 V, VVO1= 0 V, VVREG5= 4.5 V
100
150
mA
RV5SW
5-V switch resistance
VVO1= 5 V, IVREG5= 50 mA, TA = 25°C
1.8
Ω
VREG3 OUTPUT
No load, VVO1= 0 V, TA = 25°C
3.267
3.300
3.333
VVIN > 7 V , VVO1= 0 V, IVREG3< 100 mA
3.217
3.300
3.383
VVREG3
VREG3 output voltage
5.5 V < VVIN , VVO1= 0 V, IVREG3< 35 mA
3.234
3.300
3.366
V
VVIN > 5.5 V, VVO1 = 0 V, IVREG3< 35 mA, 0°C ≤ TA ≤ 85°C
3.267
3.300
3.333
VVIN > 5.5 V, VVO1 = 5 V, IVREG3< 35 mA, 0°C ≤ TA ≤ 85°C
3.267
3.300
3.333
IVREG3
VREG3 current limit
VVO1= 0 V, VVREG3= 3.0 V, VVIN= 7 V
100
150
mA
DUTY CYCLE and FREQUENCY CONTROL
fSW1
CH1 frequency(1)
TA = 25°C, VVIN= 20 V
240
300
360
kHz
fSW2
CH2 frequency(1)
TA = 25°C, VVIN= 20 V
280
355
430
kHz
tOFF(MIN)
Minimum off-time
TA = 25°C
200
300
500
ns
MOSFET DRIVERS
Source, (VVBST – VDRVH) = 0.25 V, (VVBST – VSW) = 5 V
3.0
RDRVH
DRVH resistance
Ω
Sink, (VDRVH – VSW) = 0.25 V, (VVBST – VSW) = 5 V
1.9
Source, (VVREG5 – VDRVL) = 0.25 V, VVREG5 = 5 V
3.0
RDRVL
DRVL resistance
Ω
Sink, VDRVL = 0.25 V, 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
RVCLK (PU)
VCLK on-resistance (pull-up)
TA = 25°C
10
Ω
RVCLK (PD)
VCLK on-resistance (pull-down)
TA = 25°C
10
fCLK
Clock frequency
TA = 25°C
260
kHz
(1)
Ensured by design. Not production tested.
Copyright © 2012, Texas Instruments Incorporated
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