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参数资料
| 型号： | PTH12020WAST |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | DIP-10 |
| 文件页数： | 21/27页 |
| 文件大小： | 930K |
| 代理商： | PTH12020WAST |
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ELECTRICAL CHARACTERISTICS
www.ti.com ............................................................................................................................................................. SLTS208I – MAY 2003 – REVISED MARCH 2009
TA = 25°C, VI =12 V, VO = 3.3 V, CI = 560 F, CO = 0 F, and Io = Iomax (unless otherwise noted)
PTH12020W
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
60C, 200 LFM airflow
0
18(1)
IO
Output current
A
25C, natural convection
0
18(1)
VI
Input voltage range
Over Io range
10.8
13.2
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
5
mV
ΔRegload
Load regulation
Over Io range
5
mV
ΔRegtot
Total output variation
Includes set-point, line, load, –40C
≤ TA ≤ 85°C
±3(2)
%Vo
ΔVadj
Output voltage adjust range
Over VI range
1.2
5.5
V
RSET = 280 , Vo = 5.0 V
95%
RSET = 2.0 k, Vo = 3.3 V
93%
RSET = 4.32 k, Vo = 2.5 V
92%
η
Efficiency
IO = 12 A
RSET = 11.5 k, Vo = 1.8 V
90%
RSET = 24.3 k, Vo = 1.5 V
88%
RSET = open ckt., Vo = 1.2 V
86%
Vo
≤ 2.5 V
32
mVpp
Vr
Vo ripple (pk-pk)
20 MHz bandwidth
Vo > 2.5 V
1
%Vo
Io trip
Over-current threshold
Reset, followed by auto-recovery
30
A
ttr
Recovery time
70
Sec
1 A/s load step, 50 to 100%
Transient response
Iomax,Cout =330 F
ΔVtr
Vo over/undershoot
70
mV
ΔVomargin
Margin up/down adjust
±5%
IIL margin
Margin input current (pins 9 /10)
Pin to GND
–8 (3)
A
IIL track
Track input current (pin 8)
Pin to GND
–0.13 (3)
mA
dVtrack/dt
Track slew rate capability
Cout ≤ Cout(max)
1
V/ms
VI increasing
9.7
10.4
UVLO
Undervoltage lockout
V
VI decreasing
8.8
9.2
VIH
Input high voltage, Referenced to GND
Open(4)
V
VIL
Inhibit control (pin 3)
Input low voltage, Referenced to GND
–0.2
0.5
IIL
Input low current, Pin 3 to GND
0.24
mA
II
Input standby current
Inhibit (pin 3) to GND, Track (pin 8) open
5
mA
s
Switching frequency
Over VI and Io ranges
260
320
380
kHz
CI
External input capacitance
560 (5)
F
Non-ceramic
0
330 (6)
9900 (7)
Capacitance value
F
CO
External output capacitance
Ceramic
0
300
Equivalent series resistance (non-ceramic)
4 (8)
m
MTBF
Reliability
Per Bellcore TR-332, 50% stress, TA = 40°C, ground benign
5.3
106 Hrs
(1)
See SOA curves or consult factory for appropriate derating.
(2)
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.
(3)
A small low-leakage (<100 nA) MOSFET is recommended to control this pin. The open-circuit voltage is less than 1 Vdc.
(4)
This control pin is pulled up to an internal supply voltage. If this input is left open-circuit the module will operate when input power is
applied. A small low-leakage (<100 nA) MOSFET or open-drain/collector voltage supervisor IC is recommended for control. Do not place
an external pull-up on this pin. For further information, consult the related application note.
(5)
A 560
F electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimum of 800 mA rms of ripple
current.
(6)
An external output capacitor is not required for basic operation. Adding 330
F of distributed capacitance at the load will improve the
transient response.
(7)
This is the calculated maximum. The minimum ESR limitation will often result in a lower value. When controlling the Track pin using a
voltage supervisor, the maximum output capacitance is reduced to 6600
F. Consult the application notes for further guidance.
(8)
This is the typical ESR for all the electrolytic (non-ceramic) output capacitance. Use 7 m
as the minimum when using max-ESR values
to calculate.
Copyright 2003–2009, Texas Instruments Incorporated
3
Product Folder Link(s) :PTH12020W/L
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