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参数资料
| 型号： | TPS5450MDDAREP |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 11.7 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | GREEN, PLASTIC, SOIC-8 |
| 文件页数： | 18/24页 |
| 文件大小： | 772K |
| 代理商： | TPS5450MDDAREP |
DISSIPATION RATINGS
(1) (2)
RECOMMENDED OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS
www.ti.com ....................................................................................................................................................................................................... SLVS935 – JULY 2009
THERMAL IMPEDANCE
PACKAGE
JUNCTION-TO-AMBIENT
8-Pin DDA (4-layer board with solder)(3)
30°C/W
(1)
Maximum power dissipation may be limited by overcurrent protection.
(2)
Power rating at a specific ambient temperature TA should be determined with a junction temperature of 125°C. This is the point where
distortion starts to substantially increase. Thermal management of the final PCB should strive to keep the junction temperature at or
below 125°C for best performance and long-term reliability. See Thermal Calculations in applications section of this data sheet for more
information.
(3)
Test board conditions:
a. 2 in x 1.85 in, 4 layers, 0.062-in (1,57-mm) thickness
b. 2-oz copper traces located on the top and bottom of the PCB
c. 2-oz copper ground planes on the two internal layers
d. Four thermal vias in the PowerPAD area under the device package
MIN
MAX
UNIT
VI
Input voltage range
5.5
36
V
TJ
Operating junction temperature
–55
125
°C
TJ = –55°C to 125°C, VIN = 5.5 V to 36 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE (VIN PIN)
VSENSE = 2 V, Not switching, PH pin open
3
4.4
mA
IQ
Quiescent current
Shutdown, ENA = 0 V
18
60
A
UNDERVOLTAGE LOCK OUT (UVLO)
Start threshold voltage, UVLO
5.3
V
Hysteresis voltage, UVLO
330
mV
VOLTAGE REFERENCE
TJ = 25°C
1.202
1.221
1.239
Voltage reference accuracy
V
IO = 0 A – 5 A; TJ = Full Range
1.193
1.221
1.245
OSCILLATOR
TJ = 25°C
400
500
600
kHz
Internally set free-running frequency
TJ = Full Range
375
500
600
Minimum controllable on time
150
220
ns
Maximum duty cycle
87
89
%
ENABLE (ENA PIN)
Start threshold voltage, ENA
1.3
V
Stop threshold voltage, ENA
0.5
V
Hysteresis voltage, ENA
450
mV
Internal slow-start time (0~100%)
5.4
8
10
ms
CURRENT LIMIT
TJ = 25°C
6.0
7.5
9.0
A
Current limit
TJ = Full Range
4.4
7.5
11.7
TJ = 25°C
13
16
20
ms
Current limit hiccup time
TJ = Full Range
13
16
22.5
THERMAL SHUTDOWN
Thermal shutdown trip point
135
162
°C
Thermal shutdown hysteresis
14
°C
Copyright 2009, Texas Instruments Incorporated
3
Product Folder Link(s): TPS5450-EP
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