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| 型號(hào)： | PTH04040WAS |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | DIP-20 |
| 文件頁(yè)數(shù)： | 19/25頁(yè) |
| 文件大?。?/td> | 535K |
| 代理商： | PTH04040WAS |
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SLTS238C – SEPTEMBER 2005 – REVISED JUNE 2010
ELECTRICAL CHARACTERISTICS
TA = 25°C, VI = 5 V, VO = 2.5 V, CI = 1000 F, CO = 660 F, and IO = IOmax (unless otherwise stated)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
IO
Output current
60°C, 200 LFM airflow
0
60(1)
A
VI
Input voltage range
Over IO range
2.95(2)
5.5
V
VOtol
Set-point voltage tolerance
±2(3)
%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, –40°C
≤ TA ≤ 85°C
±3(3)
%VO
2.95
≤ VI ≤ 4.5 V
(3)
0.8
-
1.65
VO, ADJ
Output adjust range
V
4.5 < VI ≤ 5.5 V
(3)
0.8
-
2.5
RSET = 2.21 k, VO = 2.5 V
93%
RSET = 5.49 k, VO = 1.8 V
90%
VI = 5 V, IO = 45 A
RSET = 8.87 k, VO = 1.5 V
88%
h
Efficiency
RSET = 17.4 k, VO = 1.2 V
86%
RSET = 6.92 k, VO = 1.65 V
92%
VI = 3.3 V, IO = 45 A
RSET = 8.87 k, VO = 1.5 V
91%
RSET = 36.5 k, VO = 1 V
87%
VR
VO ripple (peak-to-peak)
20-MHz bandwidth
All voltages
15
mVPP
IOtrip
Overcurrent threshold
Reset, followed by auto-recovery
90
A
trr
Recovery time
100
S
1 A/s load step, 50 to 100%
Transient response
IOmax, CO=660F
ΔVtr
VO over/undershoot
200
mV
Margin up down adjust
From a given set-point voltage
±5%
%
IILmargin
Margin input current
Pin to GND
–8(4)
A
IILtrack
Track input current (pin 18)
Pin to GND
–0.11(5)
mA
dV/dt
Track slew rate capability
|VTRACK – VO | ≤ 50 mV and V(TRACK) < VO(nom)
1
V/ms
On-threshold
2.6(6)
UVLO
Undervoltage lockout
Pin 8 open
V
Hysterisis
0.6(6)
Input high voltage (VIH), Referenced to GND
2.5
Open(7)
V
Inhibit control (pin 7)
Input low voltage (VIL), Referenced to GND
–0.2
0.5
Input low current (IIL), Pin to GND
0.5
mA
IIinh
Input standby current
Inhibit (pin 7) to GND
60
mA
f s
Switching frequency
Over VI and IO ranges
675
825
975
kHz
(1)
See SOA curves or consult factory for appropriate derating.
(2)
The nominal input voltage must be at least 2 × VO. Output voltage regulation is specified with an input voltage within ±10% from nominal
3.3 V or 5 V. For example, for VI = 5 V and VO = 2.5 V, the input can vary between 4.5 V and 5.5 V.
(3)
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.
(4)
A small, low-leakage (<100 nA) MOSFET is recommended to control this pin. The open-circuit voltage is less than 1 Vdc.
(5)
This control pin has an internal pull-up to VI. If it is left open-circuit the module operates when input power is applied. A small,
low-leakage (<100 nA) MOSFET or open-drain/collector voltage supervisor IC is recommended for control. See the Auto-Track
Application Information section for further guidance.
(6)
These are the default voltages. They may be adjusted using the UVLO Prog control input. See the UVLO Application Information section
for further guidance.
(7)
This control pin has an internal pull-up to VI. If it is left open-circuit the module operates 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. See the Inhibit Application Information section for further guidance.
Copyright 2005–2010, Texas Instruments Incorporated
3
Product Folder Link(s): PTH04040W
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