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TPS54521RHLT Datasheet(PDF) 5 Page - Texas Instruments

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Part # TPS54521RHLT
Description  4.5V to 17V Input, 5A Synchronous Step Down Converter
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54521RHLT Datasheet(HTML) 5 Page - Texas Instruments

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TPS54521
www.ti.com
SLVS981C – JUNE 2010 – REVISED AUGUST 2013
ELECTRICAL CHARACTERISTICS (continued)
TJ= –40°C to 125°C, VIN = 4.5V to 17V, PVIN = 1.6V to 17V (unless otherwise noted)
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
THERMAL SHUTDOWN
Thermal shutdown
140
150
°C
Thermal shutdown hysteresis
5
°C
TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN)
Minimum switching frequency
Rrt = 240 k
Ω (1%)
160
200
240
kHz
Switching frequency
Rrt = 100 k
Ω (1%)
400
480
560
kHz
Maximum switching frequency
Rrt = 53 k
Ω (1%)
765
900
1035
kHz
Minimum pulse width
20
ns
RT/CLK high threshold
2
V
RT/CLK low threshold
0.8
V
RT/CLK falling edge to PH rising edge delay
Measure at 500 kHz with RT resistor in series
62
ns
Switching frequency range (RT mode set point
200
900
kHz
and PLL mode)
PH (PH PIN)
Minimum on time
Measured at 90% to 90% of PH, TA = 25°C, IPH =
97
135
ns
2A
Minimum off time
BOOT-PH
≥ 3 V
0
ns
BOOT (BOOT PIN)
BOOT-PH UVLO
2.1
3
V
SLOW START AND TRACKING (SS/TR PIN)
SS charge current
2.3
μA
SS/TR to VSENSE matching
V(SS/TR) = 0.4 V
29
60
mV
POWER GOOD (PWRGD PIN)
VSENSE falling (Fault)
91
% Vref
VSENSE rising (Good)
94
% Vref
VSENSE threshold
VSENSE rising (Fault)
109
% Vref
VSENSE falling (Good)
106
% Vref
Output high leakage
VSENSE = Vref, V(PWRGD) = 5.5 V
30
100
nA
Output low
I(PWRGD) = 2 mA
0.3
V
Minimum VIN for valid output
V(PWRGD) < 0.5V at 100 μA
0.6
1
V
Minimum SS/TR voltage for PWRGD valid
1.2
1.4
V
Copyright © 2010–2013, Texas Instruments Incorporated
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