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부품번호 | SC195F 기능 |
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기능 | 500mA Synchronous Step Down DC-DC Regulator | ||
제조업체 | Semtech | ||
로고 | |||
POWER MANAGEMENT
Features
Input Voltage — 2.9V to 5.5V
Output Voltage — 0.8V to 3.3V
Output current capability — 500mA
Efficiency up to 94%
15 Programmable output voltages
Fast transient response
Oscillator frequency — 3.5MHz
100% duty cycle capability
Quiescent current — 4.8 mA typ
Shutdown Current — 0.1µA typ
Internal soft-start
Over-voltage protection
Current limit and short circuit protection
Over-temperature protection
Input under-voltage lockout
Floating control pin protection
MLPQ-UT8 1.5 x 1.5 x 0.6 (mm) package
Pb free, halogen free, and RoHS/WEEE compliant
Applications
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
SC195F
3.5MHz, 500mA Synchronous
Step Down DC-DC Regulator
Description
The SC195F is a high efficiency, 500mA step down regula-
tor designed to operate with an input voltage range of
2.9V to 5.5 V. The input voltage range makes it ideal for
battery operated applications with space limitations. The
SC195F operates at a fixed 3.5MHz switching frequency in
normal PWM (Pulse-Width Modulation) mode. The
SC195F 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 dynamically switched between different levels.
Pulling all four control pins low disables the output.
The SC195F provides several protection features to safe-
guard the device under stressed conditions. These
include short circuit protection, over-temperature protec-
tion, input under-voltage lockout, and soft-start to control
in-rush current. These features, coupled with the small
1.5 x 1.5 x 0.6 (mm) package make the SC195F a versatile
device ideal for step-down regulation in products needing
high efficiency and a small PCB footprint.
Typical Application Circuit
VIN
2.9V to 5.5V
CIN
4.7µF
SC195F
IN
LX
OUT
LX
1.0µH
Control Logic
Lines
Rev 2.0
CTL3
CTL2
CTL1
CTL0
GND
© 2016 Semtech Corporation
VOUT
0.8V to 3.3V
COUT
10µF
1
SC195F
Electrical Characteristics (continued)
Parameter
Symbol
Condition
Soft-Start
tSS
Thermal Shutdown
TOT
Thermal Shutdown Hysteresis
THYST
Logic Inputs - CTL0, CTL1, CTL2, and CTL3
VOUT = 90% of final value (4)
Rising temperature
Input High Voltage
VIH
Input Low Voltage
VIL
Input High Current
IIH VCTL 0-3= VIN
Input Low Current
IIL VCTL 0-3= GND
Notes
(1) Maximum output voltage is limited to VIN if the input is less than 3.3V.
(2) Measured from IN to LX.
(3) Measured from LX to GND.
(4) Soft start time depends on the load and output capacitance, see Soft Start section.
Min Typ Max Units
350 500
µs
160 °C
20 °C
1.6 V
0.4 V
-2.0 5.0 µA
-2.0 2.0 µA
4
4페이지 SC195F
Typical Characteristics (continued)
Heavy Load Switching — VOUT = 1.0V
VOUT (50mV/div)
Heavy Load Switching — VOUT = 1.8V
VOUT (50mV/div)
VLX (2.0V/div)
VLX (2V/div)
ILX (200mA/div)
ILX (200mA/div)
Time (200ns/div)
Load Transient Response — 200 to 500mA
VOUT (100mV/div)
Time (200ns/div)
VID Transient Response — PWM
1.2V to 1.8V transition
VOUT (500mV/div)
ILX (500mA/div)
ILOAD (500mA/div)
Time (20μs/div)
Line Transient Response — PWM
3.5V to 4.0V transition on VIN
VOUT (100mV/div)
ILX (200mA/div)
ILX (200mA/div)
VCTL2 (2.0V/div)
Time (20μs/div)
Shutdown Transient Response
VOUT (2V/div)
ILX (200mA/div)
VIN 500mV/div)
Time (20μs/div)
VCTL3-0 (2V/div)
Time (20μs/div)
7
7페이지 | |||
구 성 | 총 18 페이지수 | ||
다운로드 | [ SC195F.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
SC195 | 500mA Synchronous Step Down DC-DC Regulator | Semtech |
SC195B | 500mA Synchronous Step Down DC-DC Regulator | Semtech |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |