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PTH08T260W Datasheet(PDF) 4 Page - Texas Instruments

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No. de Pieza. PTH08T260W
Descripción  3-A, 4.5-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TurboTrans
Descarga  36 Pages
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Fabricante  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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PTH08T260W Datasheet(HTML) 4 Page - Texas Instruments

 
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ELECTRICAL CHARACTERISTICS
PTH08T260W, PTH08T261W
SLTS272A – DECEMBER 2006 – REVISED MAY 2007
T
A =25°C, VI = 5V, VO = 3.3V, CI = 330µF, CO1 = 100µF ceramic, CO2 = 100µF, IO = IOmax (unless otherwise stated)
PARAMETER
TEST CONDITIONS
PTH08T260W
MIN
TYP
MAX
UNIT
IO
Output current
Over VO range
25
°C, natural convection
0
3
A
11
×
0.69
≤ V
O≤ 1.2
4.5
VO(1)
VI
Input voltage range
Over IO range
V
1.2 < VO≤ 3.6
4.5
14
3.6 < VO≤ 5.5
VO +1(2)
14
Output adjust range
Over IO range
0.69
5.5
V
Set-point voltage tolerance
±1.0 (3)
%Vo
Temperature variation
–40
°C < T
A < 85°C
±0.25
%Vo
VO
Line regulaltion
Over VI range
±3
mV
Load regulation
Over IO range
±2
mV
Total output variation
Includes set-point, line, load, –40
°C ≤ T
A ≤ 85°C
±1.5 (3)
%VO
RSET = 169 Ω, VI = 8.0 V, VO = 5.0V
95%
RSET = 1.21 kΩ, VO = 3.3 V
92%
RSET = 2.37 kΩ, VO = 2.5 V
90%
RSET = 4.75 kΩ, VO = 1.8 V
88%
η
Efficiency
IO = 3 A
RSET = 6.98 kΩ, VO = 1.5 V
87%
RSET = 12.1 kΩ, VO = 1.2 V
85%
RSET = 20.5 kΩ, VO = 1.0 V
83%
RSET = 681 Ω, VO = 0.7 V
79%
VO Ripple (peak-to-peak)
20-MHz bandwidth
1
%VO
ILIM
Overcurrent threshold
Reset, followed by auto-recovery
5.5
A
w/o TurboTrans
Recovery Time
60
µSec
CO1 = 100 µF, ceramic
VO Overshoot
55
mV
CO2 = 100µF, Type B
2.5 A/µs load step
w/o TurboTrans (4)
Recovery Time
70
µSec
50% to 100% IOmax CO1 = 100 µF, ceramic
Transient response
VO Overshoot
37
mV
VI = 12 V
CO2 = 660 µF, Type B
VO = 3.3 V
with TurboTrans
Recovery Time
110
µSec
CO1 = 100 µF, ceramic
CO2 = 660 µF, Type B
VO Overshoot
20
mV
RTT = 3.4 kΩ
IIL
Track input current (pin 9)
Pin to GND
-130 (5)
µA
dVtrack/dt
Track slew rate capability
CO ≤ CO (max)
1
V/ms
VI increasing, RUVLO = OPEN
4.3
4.45
Adjustable Under-voltage lockout
UVLOADJ
VI decreasing, RUVLO = OPEN
4.0
4.2
V
(pin 10)
Hysteresis, RUVLO≤ 52.3 kΩ
0.5
Input high voltage (VIH)
Open(6)
V
Inhibit control (pin 10)
Input low voltage (VIL)
-0.2
0.6
Input low current (IIL), Pin 10 to GND
235
µA
Iin
Input standby current
Inhibit (pin 10) to GND, Track (pin 9) open
5
mA
f s
Switching frequency
Over VI and IO ranges, SmartSync (pin 1) to GND
300
kHz
(1)
The maximum input voltage is duty cycle limited to (VO× 11)V or 14V, whichever is less. The maximum allowable input voltage is a
function of switching frequency, and may increase or decrease when the SmartSync feature is used. Please review the SmartSync
section of the Application Information for further guidance.
(2)
The minimum input voltage is 4.5V or (VO+1)V, whichever is greater. Additional input capacitance may be required when VI < (VO+2)V.
(3)
The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a
tolerance of 1% with 100 ppm/°C or better temperature stability.
(4)
Without TurboTrans, the minimum ESR limit of 7 m
Ω must not be violated.
(5)
A low-leakage (<100 nA), open-drain device, such as MOSFET or voltage supervisor IC, is recommended to control pin 9. The
open-circuit voltage is less than 6.5 Vdc.
(6)
This control pin has an internal pull-up. Do not place an external pull-up on this pin. If it is left open-circuit, the module operates when
input power is applied. A small, low-leakage (<100 nA) MOSFET is recommended for control. For additional information, see the related
application information section.
4
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