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TPS62400-Q1 Datasheet(PDF) 3 Page - Texas Instruments

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No. de Pieza. TPS62400-Q1
Descripción  2.25-MHz 400-mA/600-mA DUAL STEP-DOWN CONVERTER
Descarga  41 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS62400-Q1 Datasheet(HTML) 3 Page - Texas Instruments

 
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TPS62400-Q1, TPS62401-Q1
TPS62402-Q1, TPS62403-Q1
TPS62404-Q1
www.ti.com
SLVSA67 – FEBRUARY 2010
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN
NOM
MAX
UNIT
VIN
Supply voltage
2.5
6
V
Output voltage range for adjustable voltage
0.6
VIN
V
TJ
Operating junction temperature
-40
125
°C
ELECTRICAL CHARACTERISTICS
VIN = 3.6V, VOUT = 1.8V, EN = VIN, MODE = GND, L = 2.2mH, COUT = 20mF, TA = TJ = –40°C to 125°C,
typical values are at TA = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY CURRENT
VIN
Input voltage range
2.5
6.0
V
One converter, IOUT = 0mA. PFM mode
19
29
mA
enabled (Mode = 0) device not switching,
EN1 = 1 OR EN2 = 1
Two converter, IOUT = 0mA. PFM mode
32
48
mA
enabled (Mode = 0) device not switching,
IQ
Operating quiescent current
EN1 = 1 AND EN2 = 1
IOUT = 0mA, MODE/DATA = GND, for one
23
mA
converter, VOUT 1.575V
(1)
IOUT = 0mA, MODE/DATA = VIN, for one
3.6
mA
converter, VOUT 1.575V
(1)
EN1, EN2 = GND, VIN = 3.6V
(2)
1.2
3
ISD
Shutdown current
mA
EN1, EN2 = GND, VIN ramped from 0V to
0.1
1
3.6V(3)
Falling
1.5
2.35
VUVLO
Undervoltage lockout threshold
V
Rising
2.4
ENABLE EN1, EN2
VIH
High-level input voltage, EN1, EN2
1.2
VIN
V
VIL
Low-level input voltage, EN1, EN2
0
0.4
V
IIN
Input bias current, EN1, EN2
EN1, EN2 = GND or VIN
0.05
1.0
mA
DEF_1 INPUT
DEF_1 pin is a digital input at TPS62401
VDEF_1H
DEF_1 high level input voltage
0.9
VIN
V
fixed output voltage option
DEF_1 pin is a digital input at TPS62401
VDEF_1L
DEF_1 low level input voltage
0
0.4
V
fixed output voltage option
IIN
Input bias current DEF_1
DEF_1 GND or VIN
0.01
1.0
mA
MODE/DATA
VIH
High-level input voltage, MODE/DATA
1.2
VIN
V
VIL
Low-level input voltage, MODE/DATA
0
0.4
V
IIN
Input bias current, MODE/DATA
MODE/DATA = GND or VIN
0.01
1.0
mA
VOH
Acknowledge output voltage high
Open drain, via external pullup resistor
VIN
V
VOL
Acknowledge output voltage low
Open drain, sink current 500mA
0
0.4
V
INTERFACE TIMING
tStart
Start time
2
ms
tH_LB
High time low bit, logic 0 detection
Signal level on MODE/DATA pin is > 1.2V
2
200
ms
2x
tL_LB
Low time low bit, logic 0 detection
Signal level on MODE/DATA pin < 0.4V
400
ms
tH_LB
(1)
Device is switching with no load on the output, L = 3.3mH, value includes losses of the coil
(2)
These values are valid after the device has been already enabled one time (EN1 or EN2 = high) and supply voltage VIN has not
powered down.
(3)
These values are valid when the device is disabled (EN1 and EN2 low) and supply voltage VIN is powered up. The values remain valid
until the device has been enabled first time (EN1 or EN2 = high). After first enable, Note 3 becomes valid.
Copyright © 2010, Texas Instruments Incorporated
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