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参数资料
| 型号： | LTC1261IS8#TR |
| 厂商： | Linear Technology |
| 文件页数： | 5/18页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHD CAP INV ADJ 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 切换式电容器（充电泵），反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | -1.25 V ~ -8 V |
| 输入电压： | 3 V ~ 8 V |
| 频率 - 开关： | 550kHz |
| 电流 - 输出： | 15mA |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
LTC1261
PIN FUNCTIONS
(CS/CS8)
NC (Pin 1/NA): No Internal Connection.
C1 + (Pin 2/Pin 2): C1 Positive Input. Connect a 0.1μF
capacitor between C1 + and C1 – . With the LTC1261CS in
doubler mode, connect a 0.1μF capacitor from C1 + to C2 – .
C1 – (Pin 3/Pin 3): C1 Negative Input. Connect a 0.1μF
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 connect
a 0.1μF 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 con-
nect a 0.1μF capacitor from C2 + to C2 – . In doubler mode
connect a 0.1μF 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 information on
internal resistor string pin connections vs output voltage.
R1 (Pin 8/NA): Internal Resistor String, 2nd Tap.
R ADJ (Pin 9/NA): Internal Resistor String Output. Connect
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 ≥10μA from the output to
minimize errors due to the bias current at the adjust pin.
Fixed output parts have the internal resistor string con-
nected 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 section 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 1μF or larger capaci-
tor; it must be at least 3.3μF to provide specified output
ripple. The size of the output capacitor has a strong effect
on output ripple. See the Applications Information section
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 V CC 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 5μA 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 5μA typically.
V CC (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. V CC must be bypassed
to ground with at least a 0.1μF capacitor placed in close
proximity to the chip. See the Applications Information
section for details.
1261fb
For more information www.linear.com/LTC1261
5
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相关代理商/技术参数 |
参数描述 |
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| LTC1261LCMS8 | 功能描述:IC REG SWITCHD CAP INV ADJ 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC1261LCMS8#PBF | 功能描述:IC REG SWITCHD CAP INV ADJ 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LTC1261LCMS8#TR | 功能描述:IC REG SWITCHD CAP INV ADJ 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC1261LCMS8#TRPBF | 功能描述:IC REG SWITCHD CAP INV ADJ 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC1261LCMS8-4 | 功能描述:IC REG SWITCHD CAP INV -4V 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
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