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参数资料
型号： PTH08T255WAD
厂商： TEXAS INSTRUMENTS INC
元件分类： 电源模块
英文描述： DC-DC REG PWR SUPPLY MODULE
封装： PLASTIC, MODULE-22
文件页数： 29/34页
文件大小： 4336K
代理商： PTH08T255WAD
ELECTRICAL CHARACTERISTICS
PTH08T255W
SLTS290 – NOVEMBER 2008 ........................................................................................................................................................................................... www.ti.com
PTH08T255W
TA = 25°C, VI = 12 V, VO = 3.3 V, CI = 1000 F, CO = 1000 F, and IO = IO max (unless otherwise stated)
PARAMETER
TEST CONDITIONS
PTH08T255W
UNIT
MIN
TYP
MAX
25°C, natural convection
0
40
IO
Output current
Over VO range
A
60°C, 200 LFM
0
40
VI
Input voltage range
Over IO and VO range
8.0
14
V
VOADJ
Output voltage adjust range
Over IO range
3.0
5.25
V
Set-point voltage tolerance
±0.5
±1 (1)
%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 (1)
%Vo
RSET = 1.36 k, VO = 5.0 V
95%
η
Efficiency
IO = 30 A
RSET = 34.5 k, VO = 3.3 V
94%
VO Ripple (peak-to-peak)
20-MHz bandwidth
20
mVPP
ILIM
Overcurrent threshold
Reset, followed by auto-recovery
80
A
ttr
Recovery time
200
s
w/o TurboTrans
CO= 1000 F, TypeC
ΔVtr
VO over/undershoot
135
mV
2.5 A/s load step
Transient response
50 to 100% IOmax
ttrTT
w/ TurboTrans
Recovery time
400
s
CO= 5000 F, TypeC
mV
ΔVtrTT
VO over/undershoot
35
RTT = short
IIL
Track input current (pin 20)
Pin to GND
–130(2)
A
dVtrack/dt
Track slew rate capability
CO ≤ CO (max)
1
V/ms
VI increasing, RUVLO = OPEN
7.2
8.0
Adjustable Under-voltage lockout
UVLOADJ
VI decreasing, RUVLO = OPEN
6.7
V
(pin 21)
Hysteresis
0.5
Input high voltage (VIH)
Open(3)
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 (4)
kHz
fSYNC
Synchronization frequency applied to pin 22
240 (4)
400 (4)
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
Nonceramic
1000 (5)
CI
External input capacitance
F
Ceramic
22
(1)
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.
(2)
A low-leakage (<100 nA), open-drain device, such as MOSFET or voltage supervisor IC, is recommended to control pin 20. When using
this feature, a 100k
pull-up resistor to VI is required. If unused, this pin must be directly connected to VI. See the Auto-Track section of
the datasheet for more information.
(3)
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 On/Off Inhibit section of the datasheet.
(4)
The PTH08T255W is a two-phase power module. Each phase switches at 300kHz 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.
(5)
A 1000 F electrolytic input capacitor is required for proper operation. The input capacitor must be rated for a minimum of 750 mA rms
of ripple current.
4
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): PTH08T255W
相关PDF资料
PDF描述
PTH08T261WAD 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH08T260WAST 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH08T261WAST 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH08T260WAD 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
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相关代理商/技术参数
参数描述
PTH08T255WAS 功能描述:DC/DC转换器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸:
PTH08T255WAST 功能描述:DC/DC转换器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸:
PTH08T255WAZ 功能描述:DC/DC转换器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸:
PTH08T255WAZT 功能描述:DC/DC转换器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸:
PTH08T260W 制造商:TI 制造商全称:Texas Instruments 功能描述:3-A, 4.5-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TurboTrans
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