- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385475 > LM1572 (National Semiconductor Corporation) 1.5A, 500kHz Step-down Voltage Regulator PDF資料下載
參數(shù)資料
| 型號： | LM1572 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 1.5A, 500kHz Step-down Voltage Regulator |
| 中文描述： | 1.5A的，500kHz降壓型穩(wěn)壓器 |
| 文件頁數(shù)： | 6/17頁 |
| 文件大?。?/td> | 584K |
| 代理商： | LM1572 |
Electrical Characteristics
(Continued)
Unless otherwise specified, all limits are guaranteed for T
= 25C, V
IN
= 15V, V
= 1.5V, V
= 5V, I
= 0A, unless
otherwise noted.
Boldface
apply over the temperature extremes. ’V
FB
low (high)’ is 0.95 (1.05) times the nominal value at
regulation.
Symbol
Parameter
Conditions
Min
(Note 5)
Typ
(Note
6)
4.5
26
Max
(Note 5)
Units
I
SS
I
SD
Softstart Pin Current
Shutdown Supply Current
V
SS
= 1V,V
FB
=0V
V
SD
= 0V,V
COMP
= 1V,V
FB
low
2.5
8
52
75
4
4.3
2.5
1.28
μA
μA
I
STDBY
Standby Supply Current
V
SD
= 1.5V, Comp Open
2.3
mA
V
UVLO
V
SD
Undervoltage Lockout Threshold
Shutdown Threshold
Comp Open, V
FB
low
Comp Open, V
COMP
= 1V, V
FB
low
2.2
0.75
2.38
1.0
V
V
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 specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2:
This is for the human body model, which is a 100pF capacitor discharged through a 1.5k resistor into each pin.
Note 3:
Minimum input voltage is defined as the voltage where internal bias lines are still regulated so that the reference voltage and oscillator remain constant.
Actual minimum input voltage to maintain output in regulation depends on output voltage and load current. In particular, the required duty cycle must be less than
the lowest possible upper duty cycle limit of the controller (D
= 0.86). The maximum input voltage will also depend on output voltage and load current. In
particular, the required duty cycle must be greater than the lowest possible duty cycle limit of the controller (D
MIN
= 0.15), estimated from the typical minimum
on-time, which is about 300ns.
Note 4:
Junction to Ambient thermal resistance with the TSSOP-16 package soldered on a 1oz. printed circuit board with copper area of approximately 1in
2
.
Note 5:
All limits guaranteed at room temperature (standard face type) and at
temperature extremes (bold face type)
. All room temperature limits are 100%
production tested. All limits at
temperature extremes
are guaranteed via correlation using Statistical Quality Control (SQC) methods. All limits are used to calculate
Average Outgoing Quality Level (AOQL).
Note 6:
Typical numbers are at 25C and represent the most likely norm.
Note 7:
Transconductance and voltage gain refer to the internal amplifier, excluding any voltage divider as is present on the fixed voltage parts. To calculate the gain
and transconductance for the fixed voltage parts, divide values shown in table by the ratio V
FB_5
/2.42 = 2.07 for the 5V part and by V
FB_3.3
/2.42 = 1.36 for the 3.3V
part.
Note 8:
To ensure stable operation, the maximum recommended operating duty cycle is 80%.
L
www.national.com
6
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM1577-12 | SIMPLE SWITCHER Step-Up Voltage Regulator |
| LM1577-15 | SIMPLE SWITCHER Step-Up Voltage Regulator |
| LM1577-ADJ | SIMPLE SWITCHER Step-Up Voltage Regulator |
| LM160 | High Speed Differential Comparator |
| LM1771UMMX | Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM1572EVAL | 功能描述:BOARD EVALUATION LM1572 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| LM1572MTC-3.3/NOPB | 功能描述:IC REG BUCK 3.3V 1.5A 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應(yīng)商設(shè)備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| LM1572MTC-5.0/NOPB | 功能描述:IC REG BUCK 5V 1.5A 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應(yīng)商設(shè)備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| LM1572MTC-ADJ | 制造商:Texas Instruments 功能描述:IC V REG BUCK 1.5A ADJ SMD 1572 |
| LM1572MTC-ADJ/NOPB | 功能描述:IC REG BUCK ADJ 1.5A 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應(yīng)商設(shè)備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。