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參數(shù)資料
| 型號(hào)： | PTV08T250WAD |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 23/30頁 |
| 文件大小： | 795K |
| 代理商： | PTV08T250WAD |
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ELECTRICAL CHARACTERISTICS
www.ti.com .......................................................................................................................................... SLTS260E – OCTOBER 2005 – REVISED NOVEMBER 2008
TA = 25°C, VI = 12 V, VO = 3.3 V, CI = 560 F, CO = 660 F, and IO = IOmax (unless otherwise stated)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
25°C, Natural Convection
0
50(1)
IO
Output current
8 V
≤ VI ≤ 14 V
A
60°C, 200 LFM airflow
0
48(1)
VI
Input voltage range
Over IO range
8
14
V
VOtol
Set-point voltage tolerance
±2(2)
%VO
ΔRegtemp Temperature variation
–40°C < TA < 85°C
±0.5
%VO
ΔRegline
Line regulation
Over VI range
±3
mV
ΔRegload
Load regulation
Over IO range
±3
mV
ΔRegtot
Total output variation
Includes set-point, line, load, –40°C
≤ TA ≤ 85°C
±3(2)
%VO
ΔRegadj
Output adjust range
0.8
3.6
V
RSET = 2.49 k, VO = 3.3 V
95
RSET = 6.98 k, VO = 2.5 V
93
RSET = 13.0 k, VO = 2 V
92
RSET = 16.9 k, VO = 1.8 V
91
η
Efficiency
IO = 35 A
%
RSET = 27.4 k, VO = 1.5 V
90
RSET = 53.6 k, VO = 1.2 V
88
RSET = 113.0 k, VO = 1 V
86
RSET = open circuit, VO = 0.8 V
82
VO ripple (peak-to-peak)
20-MHz bandwidth
All voltages
15
mVPP
IOtrip
Overcurrent threshold
Reset, followed by auto-recovery
75
100
115
A
ttr
w/o TurboTrans
Recovery time
50
s
ΔVtr
CO= 660 F
VO over/undershoot
130
mV
ttr
w/o TurboTrans
Recovery time
50
s
2.5 A/s load step
Transient response
50 to 100% IOmax
ΔVtr
CO= 3300 F, Type C
VO over/undershoot
85
mV
ttrTT
w/ TurboTrans
Recovery time
50
s
ΔVtrTT
CO= 3300 F, Type C
VO over/undershoot
50
mV
IILtrack
Track input current (pin 15)
Pin to GND
–0.13 (3)
mA
dVtrack/dt
Track slew rate capability
CO ≤ CO(max)
1
V/ms
VI Increasing
7.5(4)
7.8
Undervoltage lockout
UVLO
Pin 16 open
V
threshold
VI Decreasing
6.5(4)
Inhibit control (pin 16)
VIH
Input high voltage
Referenced to GND
2.5
Open(5)
V
VIL
Input low voltage
Referenced to GND
–0.2
0.5
IILinhibit
Input low current
Pin to GND
0.5
mA
IIinh
Input standby current
Inhibit pin (16) to GND
35
mA
f s
Switching frequency
Over VI and IO ranges
900
1050
1200
kHz
CI
External input capacitance
560(6)
F
(1)
See SOA curves or consult factory for appropriate derating.
(2)
The set-point voltage tolerance is affected by the tolerance of RSET. The stated limit is unconditionally met if RSET has a tolerance of 1%
with 100 ppm/°C or better temperature stability.
(3)
This control pin has an internal pull-up to 5 V. A small, low-leakage (<100 nA) MOSFET or open-drain/collector voltage supervisor IC is
recommended to control this pin. For further information, see the related application section.
(4)
These are the default voltages. They may be adjusted using the UVLO Prog control input. See the Application Information section for
further guidance.
(5)
This control pin has an internal pull-up to 5 V. When left open-circuit the module operates when input power is applied. A small,
low-leakage (<100 nA) MOSFET is recommended to control this pin. For further information, see the related application section.
(6)
A minimum capacitance of 560-F is required at the input for proper operation. For best results, 1000 F is recommended. The
capacitance must be rated for a minimum of 300 mArms of ripple current.
Copyright 2005–2008, Texas Instruments Incorporated
3
Product Folder Link(s): PTV08T250W
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