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TPS62748YFPT Datasheet(PDF) 6 Page - Texas Instruments

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No. de pieza TPS62748YFPT
Descripción Electrónicos  TPS62748 300 mA High Efficiency Buck Converter with Ultra-low Quiescent Current and Load Switch
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

TPS62748YFPT Datasheet(HTML) 6 Page - Texas Instruments

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TPS62748
SLVSD37A – SEPTEMBER 2015 – REVISED OCTOBER 2015
www.ti.com
Electrical Characteristics (continued)
VIN = 3.6V, TJ = –40°C to 125°C typical values are at TA = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
AUTO 100% MODE TRANSITION
Auto 100% Mode
VTH_100+
leave detection
Rising VIN,100% Mode is left with VIN = VOUT + VTH_100+
150
250
350
threshold (1)
mV
Auto 100% Mode
VTH_100-
enter detection
Falling VIN, 100% Mode is entered with VIN = VOUT + VTH_100-
85
200
290
threshold (1)
OUTPUT
High side softstart
80
150
200
switch current limit
ILIM_softstart
EN=low to high
mA
Low side softstart
150
switch current limit
Output voltage
Output voltages are selected with pins VSEL
1.2
1.8
range
V
IOUT = 10mA, VOUT = 1.8V
-2.5
0%
2.5
Output voltage
accuracy
IOUT = 100mA, VOUT = 1.8V
–2
0%
2
VOUT
DC output voltage
VOUT = 1.8V
0.001
%/mA
load regulation
DC output voltage
VOUT = 1.8V, IOUT = 100mA, 2.2V ≤ VIN ≤ 5.0V
0
%/V
line regulation
(1)
VIN is compared to the programmed output voltage (VOUT). When VIN–VOUT falls below VTH_100- the device enters 100% Mode by turning
the high side MOSFET on. The 100% Mode is exited when VIN–VOUT exceeds VTH_100+ and the device starts switching. The hysteresis
for the 100% Mode detection threshold VTH_100+ - VTH_100- will always be positive and will be approximately 50 mV(typ)
8.6 Timing Requirements
VIN = 3.6V, TJ = –40°C to 125°C typical values are at TA = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
LOAD Switch
trise_LOAD
VLOAD rise time
CTRL= low to high, VOUT = 1.8V, 2.2V ≤ VIN ≤ 5.5V, ILOAD = 20mA
315
800
μs
OUTPUT
tONmin
Minimum ON time
VOUT = 2.0V, IOUT = 0 mA
225
ns
tOFFmin
Minimum OFF time VIN = 2.3V
50
ns
Regulator start up
tStartup_delay
From transition EN = low to high until device starts switching
10
25
ms
delay time
tSoftstart
Softstart time
2.2V
≤ VIN ≤ 5.5V, EN = VIN
700
1200
µs
6
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