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參數(shù)資料
4
LTC1986
V
OUT
(Pin 1):
Charge Pump Output. The V
OUT
voltage will
depend on the MODE pin input voltage. V
OUT
= 0V in
shutdown mode, V
OUT
= V
IN
in 3V mode and V
OUT
= 5V in
5V mode. The LTC1986 provides a 2.9V regulated output
when the part is in 3V mode and the V
IN
voltage is below
2.85V. This feature allows the input voltage to be below the
minimum voltage specification for 3V SIM cards without
violating the SIM V
CC
specification. Bypass the V
OUT
pin
with a
≥
2.2
μ
F low ESR capacitor to ground.
GND (Pin 2):
Ground. Connect to a ground plane for best
performance.
MODE (Pin 3):
MODE Input Pin. The voltage on this pin
determines the operating mode of the LTC1986. It oper-
ates in either shutdown mode, 3V mode or 5V mode
depending on the MODE pin voltage with respect to V
IN
.
PI
FU
CTIO
N
S
U
U
The three different modes can be realized by using two
external resistors as shown in the typical application
circuit. If V
MODE
< V
IN
/2 – 0.1V, the part is in shutdown
mode.If V
IN
/2 + 0.1V < V
MODE
< V
IN
– 1V, the part is in 5V
mode. If V
IN
– 0.25V < V
MODE
, the part is in 3V mode. To
achieve the lowest possible shutdown current, the MODE
pin should be pulled to 0V, i.e., both the SHDN and 3/5
signals from the controller should be pulled low.
C1
–
(Pin 4):
Charge Pump Flying Capacitor Negative
Terminal.
C1
+
(Pin 5):
Charge Pump Flying Capacitor Positive
Terminal.
V
IN
(Pin 6):
Input Supply Voltage. Bypass V
IN
with a
≥
0.1
μ
F low ESR capacitor to ground.
SIW
BLOCK DIAGRA
3V
5V
SHDN
+
–
+
–
+
–
MODE
6
3
V
IN
V
OUT
V
IN
– 0.6V
V
IN
/2
1.25V
LOGIC
UVLO/
THERMAL
SHDN
CHARGE
PUMP
900kHz
OSC
2.9V BOOST
3V MODE
SOFT START
50
5V MODE
C1
–
C1
+
1.25V
REF
+
–
SHDN
GND
1986 BD
LTC1986
2.5
4
5
1
2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1986 | 3V/5V SIM Power Supply,Micropower Charge Pump DC/DC Converter(用于3V/5V SMI電源,微功耗電荷泵DC/DC變換器) |
| LTC1992 | 2.5uA, 1% Accurate SOT-23 Comparator and Voltage Reference for Battery Monitoring |
| LTC1998IS6 | 2.5uA, 1% Accurate SOT-23 Comparator and Voltage Reference for Battery Monitoring |
| LTC1998 | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| LTC1998C | Quadruple Bus Buffer Gates With 3-State Outputs 14-SO -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1986ES6#PBF | 制造商:Linear Technology 功能描述:DP-Charge Pump/General Purpose, Cut Tape SIM Pwr Supply in SOT-23 6-lead |
| LTC1986ES6#TR | 功能描述:IC REG BOOST SWITCHED CAP SOT23 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:- 標(biāo)準(zhǔn)包裝:500 系列:- 類型:切換式電容器（充電泵），反相 輸出類型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開關(guān):900kHz 電流 - 輸出:100mA 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:SOT-23-6 細(xì)型，TSOT-23-6 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:TSOT-23-6 其它名稱:LTC1983ES6-3#TRMTR |
| LTC1986ES6#TRM | 功能描述:IC REG BOOST SWITCHED CAP SOT23 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:- 標(biāo)準(zhǔn)包裝:500 系列:- 類型:切換式電容器（充電泵），反相 輸出類型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開關(guān):900kHz 電流 - 輸出:100mA 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:SOT-23-6 細(xì)型，TSOT-23-6 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:TSOT-23-6 其它名稱:LTC1983ES6-3#TRMTR |
| LTC1986ES6#TRMPBF | 功能描述:IC REG BOOST SWITCHED CAP SOT23 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:- 標(biāo)準(zhǔn)包裝:500 系列:- 類型:切換式電容器（充電泵），反相 輸出類型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開關(guān):900kHz 電流 - 輸出:100mA 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:SOT-23-6 細(xì)型，TSOT-23-6 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:TSOT-23-6 其它名稱:LTC1983ES6-3#TRMTR |
| LTC1986ES6#TRPBF | 功能描述:IC REG BOOST SWITCHED CAP SOT23 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:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無(wú) 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
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