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参数资料
型号： LM27402SQ
厂商： NATIONAL SEMICONDUCTOR CORP
元件分类： 稳压器
英文描述： SWITCHING CONTROLLER, 1350 kHz SWITCHING FREQ-MAX, QCC16
封装： 4 X 4 MM, 0.80 MM HEIGHT, 0.65 MM PITCH, LLP-16
文件页数： 28/32页
文件大小： 653K
代理商： LM27402SQ
Symbol
Parameter
Conditions
Min
Typ
Max
Units
OVER CURRENT
V
OFFSET
Comparator Voltage Offset
-5
0
5
mV
I
CS-
Current Limit Offset Current
V
CS- = 5V
9.5
10.0
10.5
A
GATE DRIVE
R
DSON1
High-Side FET Driver Pull-Up On
Resistance
V
CBOOT - VSW = 4.7V, IHG =
+100 mA
1.7
R
DSON2
High-Side FET Driver Pull-Down On
Resistance
V
CBOOT - VSW = 4.7V, IHG =
-100 mA
1.2
R
DSON3
Low-Side FET Driver Pull-Up On
Resistance
V
VDD = 4.7V, ILG = +100 mA
1.7
R
DSON4
Low-Side FET Driver Pull-Down On
Resistance
V
VDD = 4.7V, ILG = -100 mA
1.0
T
DT
Deadtime Timeout
F
SW = 500 kHz
40
ns
SOFT-START
I
SS
Soft-Start Source Current
V
SS/TRACK = 0V
2
3
4
A
R
SS_PD
Soft-Start Pull-Down Resistance
V
SS/TRACK = 0.6V
288
T
SS_INT
Internal Soft-Start Time
1.28
ms
POWERGOOD
I
PGS
PGOOD Low Sink Current
V
PGOOD = 0.2V, VFB = 0.75V
60
100
A
I
PGL
PGOOD Leakage Current
V
PGOOD = 5V
1
10
A
O
VT
Over-Voltage Threshold
V
FB Rising
114
117
120
%
O
VT_HYS
O
VT Hysteresis
V
FB Falling
2
%
U
VT
Under-Voltage Threshold
V
FB Rising
91
94
97
%
U
VT_HYS
U
VT Hysteresis
V
FB Falling
3
%
T
DEGLITCH
Deglitch Time
V
PGOOD Rising and Falling
20
s
ENABLE
V
EN
Enable Logic High Threshold
V
EN Rising
1.10
1.17
1.24
V
EN_HYS
Enable Hysteresis
V
EN Falling
100
mV
I
EN
Enable Pin Pull-Up Current
V
EN = 0V
2
A
FREQUENCY SYNCHRONIZATION
V
LH_SYNC
SYNC Pin Logic High
V
VDD = 4.7V
2.0
V
LL_SYNC
SYNC Pin Logic Low
V
VDD = 4.7V
0.8
V
SYNC
FSW_L
Minimum Clock Sync Frequency
200
kHz
SYNC
FSW_H
Maximum Clock Sync Frequency
1200
kHz
THERMAL SHUTDOWN
T
SHD
Thermal Shutdown
Temperature Rising
165
°C
T
SHD_HYS
Thermal Shutdown Hysteresis
Temperature Falling
15
°C
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2:
The human body model is a 100 pF capacitor discharged through a 1.5 k
resistor to each pin.
Note 3:
VDD is the output of an internal linear regulator. Under normal operating conditions where VIN is greater than 5.5V, VDD must not be connected to any
external voltage source. In an application where VIN is between 3.0V and 5.5V, it is recommended to connect VDD to VIN. In order to have better noise rejection
under these conditions, a 1
and 1F RC input filter may be used.
Note 4:
Tested on a four layer JEDEC board. Four vias are provided under the LLP exposed pad and nine vias are provided under the eTSSOP exposed pad.
5
www.national.com
LM27402
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相关代理商/技术参数
参数描述
LM27402SQ/NOPB 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
LM27402SQEVAL/NOPB 功能描述:电源管理IC开发工具 LM27402SQ EVAL BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
LM27402SQX 制造商:NSC 制造商全称:National Semiconductor 功能描述:High Performance Synchronous Buck Controller with DCR Current Sensing
LM27402SQX/NOPB 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
LM27403 制造商:TI 制造商全称:Texas Instruments 功能描述:Synchronous Buck Controller with Temperature-Compensated, Inductor-DCR-Based Overcurrent Protection and Programmable Thermal Shutdown
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