參數(shù)資料
型號： PTH08T250WAZ
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)： 34/39頁
文件大?。?/td> 2220K
代理商： PTH08T250WAZ
SLTS278G – NOVEMBER 2010 – REVISED MARCH 2009
www.ti.com
ELECTRICAL CHARACTERISTICS
PTH08T250W
TA = 25°C, VI = 12 V, VO = 3.3 V, CI = 1000 F, CO = 660 F, and IO = IO max (unless otherwise stated)
PARAMETER
TEST CONDITIONS
PTH08T250W
UNIT
MIN
TYP
MAX
25°C, natural convection
0
48
IO
Output current
Over VO range
A
60°C, 200 LFM
0
50
0.7
≤ VO < 1.2
4.5
14 (1)
VI
Input voltage range
Over IO range
V
1.2
≤ VO ≤ 3.6
4.5
14
VOADJ
Output voltage adjust range
Over IO range
0.7
3.6
V
Set-point voltage tolerance
±0.5
±1 (2)
%Vo
Temperature variation
–40°C < TA < 85°C
±0.3
%Vo
VO
Line regulaltion
Over VI range
±5
mV
Load regulation
Over IO range
±5
mV
Total output variation
Includes set-point, line, load, –40°C
≤ TA ≤ 85°C
±1.5 (2)
%Vo
RSET = 1.62 k, VO = 3.3 V
94%
RSET = 5.23 k, VO = 2.5 V
93%
RSET = 12.7 k, VO = 1.8 V
91%
h
Efficiency
IO = 30 A
RSET = 19.6 k, VO = 1.5 V
90%
RSET = 35.7 k, VO = 1.2 V
88%
RSET = 63.4 k, VO = 1.0 V
86%
RSET = open, VO = 0.7 V
83%
VO Ripple (peak-to-peak)
20-MHz bandwidth
10 (1)
mVPP
ILIM
Overcurrent threshold
Reset, followed by auto-recovery
100
A
ttr
Recovery time
100
s
w/o TurboTrans
CO= 660 mF, Type C
ΔVtr
VO over/undershoot
160
mV
2.5 A/s load step
Transient response
50 to 100% IOmax
ttrTT
w/ TurboTrans
Recovery time
100
s
CO= 3300 mF, Type C
mV
ΔVtrTT
VO over/undershoot
45
RTT = short
IIL
Track input current (pin 20)
Pin to GND
–130(3)
A
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 21)
Hysteresis, RUVLO ≤ 127 k
1.0
Input high voltage (VIH)
Open(4)
V
Inhibit control (pin 21)
Input low voltage (VIL)
-0.2
0.6
Input low current (IIL ), Pin 21 to GND
-125
A
Iin
Input standby current
Inhibit (pin 21) to GND, Track (pin 20) open
35
mA
f s
Switching frequency
Over VI and IO ranges, SmartSync (pin 22) to GND
600 (5)
kHz
fSYNC
Synchronization frequency applied to pin 22
240 (5)
400 (5)
kHz
VSYNCH
SYNC High-Level Input Voltage
2.0
5.5
V
Synchronization (SYNC)
control (pin 22)
VSYNCL
SYNC Low-Level Input Voltage
0.8
V
tSYNC
SYNC Minimum Pulse Width
200
nSec
(1)
For output voltages less than 1.2 V, the output ripple may increase (up to 2×) when operating at input voltages greater than (VO × 12).
Adjusting the switching frequency using the SmartSync feature may increase or decrease this ratio. Please review the SmartSync
section of the Application Information for further guidance.
(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 low-leakage (<100 nA), open-drain device, such as MOSFET or voltage supervisor IC, is recommended to control pin 20. The
open-circuit voltage is less than 8 Vdc.
(4)
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 section.
(5)
The PTH08T250W is a two-phase power module. Each phase switches at 300 kHz typical, 180° out of phase from one another. The
over-all switching frequency is 600 kHz typical. SmartSync controls the frequency of an individual phase. When using SmartSync the
external synchronization frequency must be present before a valid input voltage is present, or before the release of inhibit control.
4
Copyright 2010–2009, Texas Instruments Incorporated
Product Folder Link(s): PTH08T250W
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PTH08T250WAZT 功能描述:DC/DC轉(zhuǎn)換器 50A 4.5V to 14V Inp Non-Isolated RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
PTH08T250WBD 制造商:Texas Instruments 功能描述:
PTH08T255WAD 功能描述:DC/DC轉(zhuǎn)換器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
PTH08T255WAS 功能描述:DC/DC轉(zhuǎn)換器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
PTH08T255WAST 功能描述:DC/DC轉(zhuǎn)換器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
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