参数资料
| 型号： | SC186ULTRT |
| 厂商： | Semtech |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 16MLPQ |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 3.3 V |
| 输入电压： | 2.9 V ~ 5.5 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 1.5MHz |
| 电流 - 输出： | 4A |
| 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： | 16-UFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 16-MLPQ-UT（3x3） |
| 其它名称： | SC186ULDKR |
SC186
POWER MANAGEMENT
Features
Description
4A Synchronous
Step-Down Regulator
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Input Voltage Range — 2.9 to 5.5V
Output Voltage Range — 0.8V to 3.3V
Output Current — up to 4A
Ultra-Small Footprint — <1mm Height Solution
Switching Frequency — 1.5MHz
Automatic Power Save Mode
Efficiency Up to 95%
Low Output Noise Across Load Range
Excellent Transient Response
Start Up into Pre-Bias Output
Duty-Cycle Low Dropout Operation — 100%
Shutdown Current — <1μA
Externally Programmable Soft Start Time
Power Good indicator
The SC186 is a 4A synchronous step-down regulator
designed to operate with an input voltage range of 2.9V
to 5.5V. The device offers fifteen pre-determined output
voltages via four control pins programmable from 0.8 to
3.3 Volts. The control pins allow for on-the-fly voltage
changes, enabling system designers to implement
dynamic power savings. The device is also capable of
adjusting output voltage via an external resistor divider.
The SC186 is optimized for maximum efficiency over a
wide range of load currents. During full load operation,
the device operates in PWM mode with fixed 1.5MHz
oscillator frequency, allowing the use of small surface
mount external components. As the load decreases, the
regulator will transition into Power Save mode maintain-
ing high efficiency.
? Input Under-Voltage Lockout
? Output Over-Voltage, Current Limit Protection
? Over-Temperature Protection
? Thermally Enhanced 3 x 3 x 0.6 (mm)
MLPQ-UT16 package
? Temperature Range — -40 to +85°C
? Lead-free, Halogen free, and RoHS/WEEE compliant
Applications
? Routers and Network Cards
? LCD TV
Connecting the control pins to logic low forces the device
into shutdown mode reducing the supply current to less
than 1μA. Connecting any of the control pins to logic high
enables the converter and sets the output voltage accord-
ing to Table 1. Other features include under-voltage
lockout, programmable soft-start to limit in-rush current,
power good indicator, over-temperature protection, and
output short circuit protection.
The SC186 is available in a thermally-enhanced, 3 x 3 x 0.6
(mm) MLPQ-UT16 package.
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Office Automation
Printers
Typical Application Circuit
V IN
C IN
22μF
R PGOOD
100k Ω
R AVIN
1 Ω
PVIN
SC186
LX
L
1.0μH
C OUT
47μF
V OUT
CTL0
CTL1
CTL2
CTL3
C AVIN
0.1μF
AVIN
PGOOD
CTL0
CTL1
CTL2
CTL3
VOUT
SS
PGND
AGND
C SS
10nF
Revision 2.0
? 2011 Semtech Corporation
1
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相关代理商/技术参数 |
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| SC187 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:4A, 2.2MHz Synchronous Step-Down Regulator with 15 Preset Output Voltages |
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