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TPS62290 Fiches technique(PDF) 3 Page - Texas Instruments

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No de pièce TPS62290
Description  1-A Step Down Converter in 2 x 2 SON Package
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS62290 Fiches technique(HTML) 3 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS
TPS62290, TPS62291, TPS62293
SLVS764C – JUNE 2007 – REVISED MARCH 2008
Over full operating ambient temperature range, typical values are at TA = 25°C. Unless otherwise noted, specifications apply
for condition VIN = EN = 3.6V. External components CIN = 4.7µF 0603, COUT = 10µF 0603, L = 2.2µH, refer to parameter
measurement information.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY
VI
Input voltage range
2.3
6
V
VIN 2.7 V to 6 V
1000
IO
Output current
VIN 2.5 V to 2.7 V
600
mA
VIN 2.3 V to 2.5 V
300
IO = 0 mA, PFM mode enabled
(MODE = GND) device not switching,
15
µA
See (1)
IQ
Operating quiescent current
IO = 0 mA, switching with no load
(MODE = VIN) PWM operation,
3.8
mA
VO = 1.8 V, VIN = 3V
ISD
Shutdown current
EN = GND
0.1
1
µA
Falling
1.85
UVLO
Undervoltage lockout threshold
V
Rising
1.95
ENABLE, MODE
High level input voltage, EN,
2.3 V
≤ VIN ≤ 6 V
1
VIN
VIH
V
MODE
Low level input voltage, EN,
2.3 V
≤ VIN ≤ 6 V
0
0.4
VIL
V
MODE
II
Input bias current, EN, MODE
EN, MODE = GND or VIN
0.01
1
µA
POWER SWITCH
High side MOSFET on-resistance
240
480
RDS(on)
VIN = VGS = 3.6 V, TA = 25°C
m
Low side MOSFET on-resistance
185
380
Forward current limit MOSFET
ILIMF
VIN = VGS = 3.6 V
1.19
1.4
1.68
A
high-side and low side
Thermal shutdown
Increasing junction temperature
140
TSD
°C
Thermal shutdown hysteresis
Decreasing junction temperature
20
OSCILLATOR
fSW
Oscillator frequency
2.3 V
≤ VIN ≤ 6 V
2.0
2.25
2.5
MHz
OUTPUT
VO
Adjustable output voltage range
0.6
VI
V
Vref
Reference voltage
600
mV
MODE = VIN, PWM operation,
VFB(PWM)
Feedback voltage
–1.5
0
1.5
2.3 V
≤ VIN ≤ 6 V, See
(2)
%
MODE = GND, device in PFM mode,
VFB(PFM)
Feedback voltage PFM mode
1
+1% voltage positioning active, See (1)
Load regulation
- 0.5
%/A
Time from active EN to reach 95% of
500
tStart Up
Start-up time
µs
VO
tRamp
VO ramp-up time
Time to ramp from 5% to 95% of VO
250
µs
VI = 3.6 V, VI = VO = VSW, EN = GND,
Ilkg
Leakage current into SW pin
0.1
1
µA
See (3)
(1)
In PFM mode, the internal reference voltage is set to typ. 1.01
× V
ref . See the parameter measurement information.
(2)
For VIN = VO + 1.0 V
(3)
In fixed output voltage versions, the internal resistor divider network is disconnected from FB pin.
Copyright © 2007–2008, Texas Instruments Incorporated
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Product Folder Link(s): TPS62290 TPS62291 TPS62293


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