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參數(shù)資料
| 型號(hào)： | LTC1261CS84.5 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR REGULATOR, 550 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | PLASTIC, SOIC-8 |
| 文件頁(yè)數(shù)： | 12/16頁(yè) |
| 文件大?。?/td> | 266K |
| 代理商： | LTC1261CS84.5 |
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5
LTC1261
PIN FUNCTIONS
UU
U
Pin numbers are shown as (LTC1261CS/LTC1261CS8).
NC (Pin 1/NA): No Internal Connection.
C1+ (Pin 2/ Pin 2): C1 Positive Input. Connect a 0.1
F
capacitor between C1+ and C1–. With the LTC1261CS in
doubler mode, connect a 0.1
F capacitor from C1+ to
C2 –.
C1– (Pin 3/Pin 3): C1 Negative Input. Connect a 0.1
F
capacitor from C1+ to C1–. With the LTC1261CS in
doubler mode only, C1– should float.
C2 + (Pin 4/NA): C2 Positive Input. In tripler mode con-
nect a 0.1
F capacitor from C2+ to C2–. This pin is used
with the LTC1261CS in tripler mode only; in doubler
mode this pin should float.
C2 – (Pin 5/NA): C2 Negative Input. In tripler mode
connect a 0.1
F capacitor from C2+ to C2 –. In doubler
mode connect a 0.1
F capacitor from C1+ to C2–.
GND (Pin 6/Pin 4): Ground. Connect to a low impedance
ground. A ground plane will help to minimize regulation
errors.
R0 (Pin 7/NA): Internal Resistor String, 1st Tap. See
Table 2 in the Applications Information section for infor-
mation on internal resistor string pin connections vs
output voltage.
R1 (Pin 8/NA): Internal Resistor String, 2nd Tap.
RADJ (Pin 9/NA): Internal Resistor String Output. Con-
nect this pin to ADJ to use the internal resistor divider.
See Table 2 in the Applications Information section for
information on internal resistor string pin connections vs
output voltage.
ADJ (COMP for fixed versions) (Pin 10/Pin 5): Output
Adjust/Compensation Pin. For adjustable parts this pin is
used to set the output voltage. The output voltage should
be divided down with a resistor divider and fed back to
this pin to set the regulated output voltage. The resistor
divider can be external or the internal divider string can
be used if it can provide the required output voltage.
Typically the resistor string should draw
≥10A from the
output to minimize errors due to the bias current at the
adjust pin. Fixed output parts have the internal resistor
string connected to this pin inside the package. The pin
can be used to trim the output voltage if desired. It can
also be used as an optional feedback compensation pin
to reduce output ripple on both adjustable and fixed
output voltage parts. See Applications Information sec-
tion for more information on compensation and output
ripple.
OUT (Pin 11/Pin 6): Negative Voltage Output. This pin
must be bypassed to ground with a 1
F or larger capaci-
tor; it must be at least 3.3
F to provide specified output
ripple. The size of the output capacitor has a strong effect
on output ripple. See the Applications Information sec-
tion for more details.
REG (Pin 12/Pin 7): This is an open drain output that pulls
low when the output voltage is within 5% of the set value.
It will sink 8mA to ground with a 5V supply. The external
circuitry must provide a pull-up or REG will not swing
high. The voltage at REG may exceed VCC and can be
pulled up to 12V above ground without damage.
SHDN (Pin 13/Pin 8): Shutdown. When this pin is at
ground the LTC1261 operates normally. An internal 5
A
pull-down keeps SHDN low if it is left floating. When
SHDN is pulled high, the LTC1261 enters shutdown
mode. In shutdown the charge pump stops, the output
collapses to 0V and the quiescent current drops to 5
A
typically.
VCC (Pin 14/Pin 1): Power Supply. This requires an input
voltage between 3V and 6.5V. Certain combinations of
output voltage and operating mode may place additional
restrictions on the input voltage. VCC must be bypassed
to ground with at least a 0.1
F capacitor placed in close
proximity to the chip. See the Applications Information
section for details.
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| LTC1261IS8 | 功能描述:IC REG SWITCHD CAP INV ADJ 8SOIC RoHS:否 類(lèi)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(lèi)型:升壓（升壓） 輸出類(lèi)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(lèi)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 |
| LTC1261IS8#PBF | 功能描述:IC REG SWITCHD CAP INV ADJ 8SOIC RoHS:是 類(lèi)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(lèi)型:升壓（升壓） 輸出類(lèi)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(lèi)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 |
| LTC1261IS8#TR | 功能描述:IC REG SWITCHD CAP INV ADJ 8SOIC RoHS:否 類(lèi)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(lèi)型:升壓（升壓） 輸出類(lèi)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(lèi)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 |
| LTC1261IS8#TRPBF | 功能描述:IC REG SWITCHD CAP INV ADJ 8SOIC RoHS:是 類(lèi)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(lèi)型:升壓（升壓） 輸出類(lèi)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(lèi)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 |
| LTC1261LCMS8 | 功能描述:IC REG SWITCHD CAP INV ADJ 8MSOP RoHS:否 類(lèi)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(lèi)型:升壓（升壓） 輸出類(lèi)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(lèi)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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