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參數(shù)資料
| 型號： | LT1076HVCT#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, PZFM7 |
| 封裝： | PLASTIC, TO-220, 7 PIN |
| 文件頁數(shù)： | 2/22頁 |
| 文件大?。?/td> | 318K |
| 代理商： | LT1076HVCT#TRPBF |
LT1074/LT1076
10
sn1074 1074fds
Figure 5. Shutdown Circuitry
Figure 6. Undervoltage Lockout
Figure 7. Adding Hysteresis
DESCRIPTIO S
U
PI
U
Undervoltage Lockout
Undervoltage lockout point is set by R1 and R2 in Figure 6.
To avoid errors due to the 10
A shutdown pin current, R2
is usually set at 5k, and R1 is found from:
RR
VV
V
TP
SH
12
=
()
VTP = Desired undervoltage lockout voltage
VSH = Threshold for lockout on the
shutdown pin = 2.45V
If quiescent supply current is critical, R2 may be increased
up to 15k , but the denominator in the formula for R2
should replace VSH with VSH – (10A)(R2).
–
+
C1
10 A
300 A
–
+
SHUTDOWN
PIN
C2
VIN
I
PIN
6V
Q1
TO TOTAL
REGULATOR
SHUTDOWN
2.3V
0.3V
LT1074PD07
LIM
EXTERNAL
CLIM
Hysteresis in undervoltage lockout may be accomplished
by connecting a resistor (R3) from the ILIM pin to the
shutdown pin as shown in Figure 7. D1 prevents the
shutdown divider from altering current limit.
LT1074PD08
R1
R2
5k
V
SHUT
GND
IN
LT1074
LT1074PD09
R1
R2
R3
V
SHUT
ILIM
IN
LT1074
OPTIONAL CURRENT
LIMIT RESISTOR
D1*
*1N4148
Trip Po
V
R
TP
int
.
==
+
235
1
2
If R3 is added, the lower trip point (VIN descending) will be
the same. The upper trip point (VUTP) will be:
VV
R
V
R
UTP
SH
=+
1
2
1
3
08
1
3
.
If R1 and R2 are chosen, R3 is given by:
R
VV R
VV
R
SH
UTP
SH
3
08
1
2
= ()( )
+
.
Example: An undervoltage lockout is required such that
the output will not start until VIN = 20V, but will continue
to operate until VIN drops to 15V. Let R2 = 2.32k.
Rk
VV
V
k
Rk
12 34
15
2 35
235
12 5
3
235 0 8 125
20 2 35 1
12 5
232
39
=
()() =
= ()(
)
+
=
.
..
.
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| LT1076HVIR | 功能描述:IC REG MULTI CONFIG ADJ 2A 7DD RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LT1076HVIR#PBF | 功能描述:IC REG MULTI CONFIG ADJ 2A 7DD 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:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LT1076HVIR#PBF | 制造商:Linear Technology 功能描述:IC, DC-DC CONV, BUCK, 100KHZ, 2.6A, TO-2 |
| LT1076HVIR#TR | 功能描述:IC REG MULTI CONFIG ADJ 2A 7DD RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LT1076HVIR#TRPBF | 功能描述:IC REG MULTI CONFIG ADJ 2A 7DD 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:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
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