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| 型号： | LT1611CS5#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG INV ADJ 0.3A SOT23-5 |
| 标准包装： | 2,500 |
| 类型： | 反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | -0.9 V ~ -10 V |
| 输入电压： | 0.9 V ~ 10 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 300mA |
| 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： | SC-74A，SOT-753 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | SOT-23-5 |
LT1611
Inverting 1.4MHz Switching
Regulator in SOT-23
FEATURES
DESCRIPTIO
s
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Very Low Noise: 1mV P–P Output Ripple
– 5V at 150mA from a 5V Input
Better Regulation Than a Charge Pump
Effective Output Impedance: 0.14 ?
Uses Tiny Capacitors and Inductors
Internally Compensated
Fixed Frequency 1.4MHz Operation
Low Shutdown Current: <1 μ A
Low V CESAT Switch: 300mV at 300mA
Tiny 5-Lead SOT-23 Package
The LT ? 1611 is the industry’s first inverting 5-lead SOT-23
current mode DC/DC converter. Intended for use in small,
low power applications, it operates from an input voltage
as low as 1.1V and switches at 1.4MHz, allowing the use
of tiny, low cost capacitors and inductors 2mm or less in
height. Its small size and high switching frequency enable
the complete DC/DC converter function to consume less
than 0.25 square inches of PC board area. Capable of
generating – 5V at 150mA from a 5V supply or – 5V at
100mA from a 3V supply, the LT1611 replaces nonregulated
“charge pump” solutions in many applications.
APPLICATIO S
The LT1611 operates in a dual inductor inverting topology
which filters the input side as well as the output side of the
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MR Head Bias
Digital Camera CCD Bias
LCD Bias
GaAs FET Bias
Positive-to-Negative Conversion
DC/DC converter. Fixed frequency switching ensures a
clean output free from low frequency noise typically present
with charge pump solutions. No load quiescent current of
the LT1611 is 3mA, while in shutdown quiescent current
drops to 0.5 μ A. The 36V switch allows V IN to V OUT
differential of up to 33V.
The LT1611 is available in the 5-lead SOT-23 package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
V IN
L1A
22 μ H
C2
1 μ F
L1B
22 μ H
Transient Response
5V
+
C1
22 μ F
V IN
SHDN
LT1611
GND
SW
NFB
R1
29.4k
R2
1200pF
D1
V OUT
–5V
150mA
C3
22 μ F
V OUT
20mV/DIV
AC COUPLED
10k
C1: AVX TAJB226M010
C2: TAIYO YUDEN LMK212BJ105MG
1611 TA01
LOAD CURRENT
150mA
50mA
100 μ s/DIV
1611 F10
C3: TAIYO YUDEN JMK325BJ226MM (1210 SIZE)
D1: MBR0520
L1: SUMIDA CLS62-220 OR 2 × MURATA LQH3C220 (UNCOUPLED)
Figure 1. 5V to – 5V, 150mA Low Noise Inverting DC/DC Converter
1
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| LT1612EMS8 | 功能描述:IC REG BUCK SYNC ADJ 0.5A 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 |
| LT1612EMS8#PBF | 功能描述:IC REG BUCK SYNC ADJ 0.5A 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 |
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