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TPS65321A-Q1 Datasheet(PDF) 7 Page - Texas Instruments

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Part # TPS65321A-Q1
Description  36-V Step-Down Converter With Eco-mode and LDO Regulator
Download  43 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS65321A-Q1 Datasheet(HTML) 7 Page - Texas Instruments

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7
TPS65321A-Q1
www.ti.com
SLVSE55 – NOVEMBER 2017
Product Folder Links: TPS65321A-Q1
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Copyright © 2017, Texas Instruments Incorporated
Electrical Characteristics (continued)
VI = 6 V to 27 V, EN1 = EN2 = VI, over-operating free-air temperature range TA = –40°C to 125°C and maximum operating
junction temperature TJ = –150°C, unless otherwise noted. VI is the voltage on the battery-supply pins, VIN and VIN_LDO.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ΔVO(ΔIL)
Load regulation
I(LDO_OUT) = 10 mA to 200 mA,
V(VIN_LDO) = 12 V,
V(LDO_OUT) = 3.3 V
35
mV
VDROPOUT
Dropout voltage
(V(VIN_LDO) – V(LDO_OUT))
I(LDO_OUT) = 200 mA
300
450
mV
I(LDO_OUT)
Output current
V(LDO_OUT) in regulation, V(VIN) ≥ 4V
280
mA
VI(VIN_LDO)
Operating input voltage on
VIN_LDO pin
V(LDO_OUT) in regulation
3
36
V
V(ref2)
Voltage reference at FB2 pin
V(LDO_OUT) = 1.1 V to 5.5 V
0.788
0.8
0.812
V
ICL(LDO_OUT) Output current-limit
V(LDO_OUT) = 0 V (the LDO_OUT pin is
shorted to ground)
280
1000
mA
IQ(LDO)
Quiescent current
V(VIN) = 12 V
Measured at VIN pin
V(EN1) = 0 V, V(EN2) = 5 V, I(LDO_OUT) =
0.01 mA to 0.75 mA
35
50
μA
PSRR
Power supply ripple rejection
V(VIN_LDO)(rip) = 0.5 VPP,
I(LDO_OUT) = 200 mA,
frequency (ƒ) = 100 Hz,
V(LDO_OUT) = 5 V and V(LDO_OUT) = 3.3 V
60
dB
V(VIN_LDO)(rip) = 0.5 VPP, I(LDO_OUT) = 200
mA, ƒ = 150 kHz,
V(LDO_OUT) = 5 V and V(LDO_OUT) = 3.3 V
30
dB
C(LDO_OUT)
Output capacitor
ESR = 0.001 Ω to 100 mΩ, large output
capacitance may be required for load
transient
V(LDO_OUT) ≥ 3.3 V
1
40
μF
C(LDO_OUT)
Output capacitor
ESR = 0.001 Ω to 100 mΩ, large output
capacitance may be required for load
transient
1.2 V
≤ V(LDO_OUT) < 3.3 V
20
40
μF
BUCK REGULATOR: RESET (nRST Pin)
RESET threshold
V(FB1) decreasing
85%
90%
95%
VOL
Output low
nRST pin asserted low due to falling
V(FB1), < 1-mA sinking current into nRST
pin
0
0.045
0.4
V
Filter time
Delay before asserting nRST low
7
14
21
μs
OVER TEMPERATURE PROTECTION
TSD
Thermal-shutdown trip point
175
ºC
Thys
Hysteresis
10
ºC


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