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TPS62172DSG Datasheet(PDF) 3 Page - Texas Instruments

No. de pieza TPS62172DSG
Descripción Electrónicos  3-17V 0.5A Step-Down Converter with DCS-ControlTM
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS62172DSG Datasheet(HTML) 3 Page - Texas Instruments

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TPS62170, TPS62171
TPS62172, TPS62173
www.ti.com
SLVSAT8A – NOVEMBER 2011 – REVISED APRIL 2012
ELECTRICAL CHARACTERISTICS
over free-air temperature range (TA=-40°C to +85°C), typical values at VIN=12V and TA=25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY
VIN
Input Voltage Range(1)
3
17
V
IQ
Operating Quiescent Current
EN=High, IOUT=0mA, device not switching
17
25
µA
ISD
Shutdown Current(2)
EN=Low
1.5
4
µA
Falling Input Voltage
2.6
2.7
2.82
V
VUVLO
Undervoltage Lockout Threshold
Hysteresis
180
mV
TSD
Thermal Shutdown Temperature
160
°C
Thermal Shutdown Hysteresis
20
CONTROL (EN, PG)
VEN_H
High Level Input Threshold Voltage (EN)
0.9
V
VEN_L
Low Level Input Threshold Voltage (EN)
0.3
V
ILKG_EN
Input Leakage Current (EN)
EN=VIN or GND
0.01
1
µA
Rising (%VOUT)
92
95
98
VTH_PG
Power Good Threshold Voltage
%
Falling (%VOUT)
87
90
93
VOL_PG
Power Good Output Low
IPG=-2mA
0.07
0.3
V
ILKG_PG
Input Leakage Current (PG)
VPG=1.8V
1
400
nA
POWER SWITCH
VIN≥6V
300
600
High-Side MOSFET ON-Resistance
m
Ω
VIN=3V
430
RDS(ON)
VIN≥6V
120
200
Low-Side MOSFET ON-Resistance
m
Ω
VIN=3V
165
ILIMF
High-Side MOSFET Forward Current Limit(3)
VIN=12V, TA=25°C
0.85
1.05
1.35
A
OUTPUT
VREF
Internal Reference Voltage(4)
0.8
V
ILKG_FB
Pin Leakage Current (FB)
TPS62170, VFB=1.2V
5
400
nA
Output Voltage Range (TPS62170)
VIN ≥ VOUT
0.9
6.0
V
PWM mode operation, VIN≥VOUT+1V
–3
3
Initial Output Voltage Accuracy(5)
%
Power Save Mode operation, COUT=22µF
-3.5
4
VOUT
DC Output Voltage Load Regulation(6)
VIN=12V, VOUT=3.3V, PWM mode operation
0.05
% / A
DC Output Voltage Line Regulation (6)
3V
≤ VIN ≤ 17V, VOUT=3.3V, IOUT= 0.5A, PWM
0.02
% / V
mode operation
(1)
The device is still functional down to Under Voltage Lockout (see parameter VUVLO).
(2)
Current into VIN pin.
(3)
This is the static current limit. It can be temporarily higher in applications due to internal propagation delay (see Current Limit And Short
Circuit Protection).
(4)
This is the voltage regulated at the FB pin.
(5)
This is the accuracy provided by the device itself (line and load regulation effects are not included). For fixed voltage versions, the
(internal) resistive feedback divider is included.
(6)
Line and load regulation are depending on external component selection and layout (see Figure 13 and Figure 14).
Copyright © 2011–2012, Texas Instruments Incorporated
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Product Folder Link(s): TPS62170 TPS62171 TPS62172 TPS62173


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