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参数资料
| 型号： | SC202MLTRT |
| 厂商： | Semtech |
| 文件页数： | 1/19页 |
| 文件大小： | 0K |
| 描述： | CONVERTER DC/DC 3.3V OUT 500MA |
| 标准包装： | 1 |
| 系列： | SC202 |
| 类型： | 非隔离（POL） |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 2.9V |
| 电压 - 输入（最大）： | 5.5V |
| Voltage - Output 1： | 0.8 ~ 3.3 V |
| 电流 - 输出（最大）： | 500mA |
| 电源（瓦） - 制造商系列： | 1.65W |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 13-VFQFN 裸露焊盘 |
| 尺寸/尺寸： | 0.12" L x 0.10" W x 0.04" H（3.0mm x 2.5mm x 1.0mm） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 电源（瓦特）- 最大： | 1.65W |
| 其它名称： | SC202MLDKR |
NOT RECOMMENDED FOR NEW DESIGN
SC202
3.5MHz, 500mA Step-down
Regulator with Integrated Inductor
POWER MANAGEMENT
Features
Description
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Input Voltage — 2.9V to 5.5V
Output Voltage — 0.8V to 3.3V
Output current capability — 500mA
Internal inductor
15 programmable output voltages
High light-load efficiency via automatic PSAVE mode
Fast transient response
Temperature range — -40 to +85°C
Oscillator frequency — 3.5MHz
100% duty cycle capability
Quiescent current — 38μA typ
Shutdown current — 0.1μA typ
Internal soft-start
Over-voltage protection
Current limit and short circuit protection
Over-temperature protection
Under-voltage lockout
The SC202 is a high efficiency 500mA step-down regula-
tor that includes an integrated inductor inside the
package. The input voltage range makes it ideal for
battery operated applications with space limitations. The
SC202 also includes fifteen programmable output voltage
settings that can be selected using the four control pins,
eliminating the need for external feedback resistors. The
output voltage can be fixed to a single setting or dynami-
cally switched between different levels. Pulling all four
control pins low disables the output.
The SC202 operates at a fixed 3.5MHz switching frequency
in normal PWM (Pulse-Width Modulation) mode. A vari-
able frequency PSAVE (power-save) mode is used to
optimize efficiency at light loads for each output setting.
Built-in hysteresis prevents chattering between the two
modes.
? Floating control pin protection
? MLPQ-13 — 2.5 x 3.0 x 1.0 (mm) package
? Lead-free and halogen-free
? WEEE and RoHS compliant
Applications
The SC202 provides several protection features to safe-
guard the device under stressed conditions. These
include short circuit protection, over-temperature protec-
tion, under-voltage lockout, and soft-start to control
in-rush current. These features, coupled with the small
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Point of load regulation
Smart phones and cellular phones
MP3/personal media players
Personal navigation devices
Digital cameras
Single Li-ion cell or 3 NiMH/NiCd cell devices
Devices with 3.3V or 5V internal power rails
2.5 x 3.0 x 1.0 (mm) package, make the SC202 a versatile
device ideal for step-down regulation in products needing
high efficiency and a small PCB footprint.
Typical Application Circuit
V IN
2.9V to 5.5V
C IN
4.7μF
IN
SC202
SNS
OUT
V OUT
0.8V to 3.3V
Control Logic
Lines
CTL3
CTL2
CTL1
CTL0
GND
LX
NC
C OUT
10μF
June 30, 2010
? 2010 Semtech Corporation
1
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