參數(shù)資料
型號(hào)： LT1616ES6
英文描述： Analog IC
中文描述： 模擬IC
文件頁(yè)數(shù)： 11/16頁(yè)
文件大?。?/td> 257K
代理商： LT1616ES6
11
LT1614
APPLICATIO
S I
FOR
ATIO
U
Shutdown Pin
The LT1614 has a Shutdown pin (SHDN) that must be
grounded to shut the device down or tied to a voltage equal
or greater than V
IN
to operate. The shutdown circuit is
shown in Figure 13.
Note that allowing SHDN to float turns on both the start-
up current (Q2) and the shutdown current (Q3) for V
IN
>
2V
BE
. The LT1614 doesn’t know what to do in this situation
and behaves erratically. SHDN voltage above V
IN
is al-
lowed. This merely reverse-biases Q3’s base emitter junc-
tion, a benign condition. The low-battery detector is dis-
abled when SHDN is low.
W
U
U
Figure 13. Shutdown Circuit
V
IN
Q3
SHUTDOWN
CURRENT
R2
400k
200k
Q2
1614 F13
Q1
START-UP
CURRENT
SHDN
Low-Battery Detector
The LT1614’s low-battery detector is a simple PNP input
gain stage with an open collector NPN output. The nega-
tive input of the gain stage is tied internally to a 200mV
reference. The positive input is the LBI pin. Arrangement
as a low-battery detector is straightforward. Figure 14
details hookup. R1 and R2 need only be low enough in
value so that the bias current of the LBI pin doesn’t cause
large errors. For R2, 100k is adequate. The 200mV refer-
ence can also be accessed as shown in Figure 15. The low-
battery detect is not operative when the device is shut
down.
Coupled Inductors
The applications shown in this data sheet use two un-
coupled inductors because the Murata units specified are
small and inexpensive. This topology can also be used
with a coupled inductor as shown in Figure 16. Be sure to
get the phasing right.
LBO
LBI
TO PROCESSOR
R1
1M
R2
100k
V
IN
LT1614
1614 F14
3.3V
GND
200mV
INTERNAL
REFERENCE
–
+
R1 =V
LB
– 200mV
2
μ
A
Figure 14. Setting Low-Battery Detector Trip Point
V
IN
LT1614
LBI
LBO
200k
10
μ
F
GND
10k
1614 F15
2N3906
V
200mV
+
Figure 15. Accessing 200mV Reference
V
IN
SHDN
SW
LT1614
L1A
10
μ
H
V
IN
5V
D1
NFB
69.8k
24.9k
100k
1nF
V
–5V
200mA
C2
33
μ
F
C1, C2: AVX TAJB336M010
C3: AVX 1206CY106
D1: MBR0520
L1: COILTRONICS CTX10-1
1614 F16
C1
33
μ
F
V
C
GND
L1B
10
μ
H
C3
1
μ
F
+
+
Figure 16. 5V to –5V Converter with Coupled Inductor
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參數(shù)描述
LT1616ES6#PBF 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 3.6V to 25V 6-Pin TSOT-23 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 3.6V to 25V 6-Pin TSOT-23 Bulk 制造商:Linear Technology 功能描述:IC, DC-DC CONV; Primary Input Voltage:25V; No. of Outputs:1; Output Voltage:3.3V; Output Current:400mA; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; MSL:MSL 1 - Unlimited ;RoHS Compliant: Yes
LT1616ES6#TR 功能描述:IC REG BUCK 3.3V/5V 0.6A SOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開(kāi)關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
LT1616ES6#TRM 功能描述:IC REG BUCK 3.3V/5V 0.6A SOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開(kāi)關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
LT1616ES6#TRMPBF 功能描述:IC REG BUCK 3.3V/5V 0.6A SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開(kāi)關(guān):2MHz 電流 - 輸出:500mA 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:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2
LT1616ES6#TRPBF 功能描述:IC REG BUCK 3.3V/5V 0.6A SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開(kāi)關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
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