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參數(shù)資料
| 型號： | MAX1974EUB |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Smallest 1A, 1.4MHz Step-Down Regulators |
| 中文描述： | 2.4 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | MICRO, SOP-10 |
| 文件頁數(shù)： | 10/15頁 |
| 文件大?。?/td> | 331K |
| 代理商： | MAX1974EUB |
M
soft-start when coming out of undervoltage lockout
(UVLO) or thermal-overload protection.
Undervoltage Lockout (UVLO)
If V
IN
drops below 2.35V (typ), the MAX1973/MAX1974
assume that the supply voltage is too low to provide a
valid output voltage, and the UVLO circuit inhibits
switching. Once V
IN
rises above 2.4V, UVLO is dis-
abled and the soft-start sequence begins.
Thermal-Overload Protection
Thermal-overload protection limits total power dissipa-
tion and protects the IC from damage in case of an
overload or short-circuit condition. When the IC junction
temperature (T
J
) exceeds +170
°
C, the device shuts
down. The part turns on again after the junction temper-
ature cools by 20
°
C. This results in a pulsed output dur-
ing continuous thermal-overload conditions.
Smallest 1A, 1.4MHz Step-Down Regulators
10
______________________________________________________________________________________
PWM
LOGIC BLOCK
PMOS
CURRENT SENSE
VOLTAGE
CLAMP
NMOS
CURRENT LIMIT
SLOPE
COMP
CHIP
ENABLE
REFERENCE
READY
UNDERVOLTAGE
LOCK OUT
FEEDBACK
SELECT
VOLTAGE
MARGINING
SOFT-START
REFERENCE
BIAS
MAX1974
ONLY
POK
IN
LX
PGND
PWM
COMPARATOR
ERROR
AMP
1.4MHz
OSCILLATOR
IN
GND
SS
COMP
OUT
FB
CTL1
CTL2
ON
MAX1973
ONLY
MAX1974
ONLY
Σ
MAX1973
MAX1974
Figure 1. Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1974EUB+ | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1A 1.4MHz Step-Down Regulator RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MAX1974EUB+T | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1A 1.4MHz Step-Down Regulator RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MAX1974EUB-G05 | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX1974EUB-T | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MAX1974EUB-TG05 | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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