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參數(shù)資料
| 型號： | LM25574Q0MTX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PDSO16 |
| 封裝： | TSSOP-16 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大?。?/td> | 394K |
| 代理商： | LM25574Q0MTX |
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V
IN to GND
45V
BST to GND
60V
PRE to GND
45V
SW to GND (Steady State)
-1.5V
BST to V
CC
45V
SD, V
CC to GND
14V
BST to SW
14V
OUT to GND
Limited to Vin
SYNC, SS, FB, RAMP to GND
7V
ESD Rating (Note 2)
Human Body Model
2kV
Storage Temperature Range
-65°C to +150°C
Operating Ratings (Note 1)
V
IN
6V to 42V
Operation Junction Temperature
40°C to + 150°C
Electrical Characteristics Specifications with standard typeface are for T
J = 25°C, and those with boldface type
apply over full Operating Junction Temperature range. V
Symbol
Parameter
Conditions
Min
Typ
Max
Units
STARTUP REGULATOR
VccReg
Vcc Regulator Output
6.85
7.15
7.5
V
Vcc LDO Mode turn-off
9
V
Vcc Current Limit
Vcc = 0V
25
mA
VCC SUPPLY
Vcc UVLO Threshold
(Vcc increasing)
5.01
5.35
5.69
V
Vcc Undervoltage Hysteresis
0.35
V
Bias Current (Iin)
FB = 1.3V
3.7
4.5
mA
Shutdown Current (Iin)
SD = 0V
48
70
A
SHUTDOWN THRESHOLDS
Shutdown Threshold
(SD Increasing)
0.43
0.7
0.9
V
Shutdown Hysteresis
0.1
V
Standby Threshold
(Standby Increasing)
1.15
1.225
1.30
V
Standby Hysteresis
0.1
V
SD Pull-up Current Source
5
A
SWITCH CHARACTERISTICS
Buck Switch Rds(on)
750
1650
m
BOOST UVLO
4
V
BOOST UVLO Hysteresis
0.56
V
Pre-charge Switch Rds(on)
70
Pre-charge Switch on-time
250
ns
CURRENT LIMIT
Cycle by Cycle Current Limit
RAMP = 0V
0.58
0.7
0.9
A
Cycle by Cycle Current Limit Delay
RAMP = 2.5V
75
ns
SOFT-START
SS Current Source
7
10
14
A
OSCILLATOR
Frequency1
180
200
220
kHz
Frequency2
R
T = 11k
425
485
545
kHz
SYNC Source Impedance
11
k
SYNC Sink Impedance
110
SYNC Threshold (falling)
1.3
V
SYNC Frequency
R
T = 11k
550
kHz
SYNC Pulse Width Minimum
15
ns
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LM25574Q0
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM25574Q0MTX/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM25574-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM25574/LM25574-Q1 SIMPLE SWITCHER 42V, 0.5A Step-Down Switching Regulator |
| LM25574QMT | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM25574/LM25574-Q1 SIMPLE SWITCHER 42V, 0.5A Step-Down Switching Regulator |
| LM25574QMT/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM25574QMTX | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM25574/LM25574-Q1 SIMPLE SWITCHER 42V, 0.5A Step-Down Switching Regulator |
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