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SC195F Dataheets PDF



Part Number SC195F
Manufacturers Semtech
Logo Semtech
Description 500mA Synchronous Step Down DC-DC Regulator
Datasheet SC195F DatasheetSC195F Datasheet (PDF)

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.

  SC195F   SC195F


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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 regulator 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 safeguard the device under stressed conditions. These include short circuit protection, over-temperature protection, 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 Pin Configuration CTL3 CTL2 CTL1 CTL0 8 17 TOP VIEW 26 3 4 5 IN LX GND Ordering Information Device Package SC195FULTRT(1)(2) MLPQ-UT8 1.5 x 1.5 SC195FEVB Evaluation Board Notes: (1) Available in tape and reel only. A reel contains 3,000 devices. (2) Lead-free packaging only. Device is WEEE and RoHS compliant and halogen-free. OUT MLPQ-UT8; 1.5 x 1.5, 8 LEAD θJA = 116°C/W Marking Information 5F=SC195F yw=Date Code Table 1 – Output Voltage Settings CTL3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 CTL2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 CTL1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 CTL0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Vout Off 0.80 1.00 1.20 1.40 1.50 1.60 1.80 2.30 2.35 2.00 2.40 2.45 2.80 3.00 3.30 2 SC195F Absolute Maximum Ratings IN (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0 LX Voltage (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.0 to VIN +0.5 Other Pins (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to VIN + 0.3 Output Short Circuit to GND. . . . . . . . . . . . . . . . . Continuous ESD Protection Level(1) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 Recommended Operating Conditions Input Voltage Range (V). . . . . . . . . . . . . . . . . . . . . +2.9 to +5.5 Thermal Information Thermal Resistance, Junction to Ambient(2) (°C/W). . . . . 116 Junction Temperature Range (°C). . . . . . . . . . . . -40 to +150 Storage Temperature Range (°C). . . . . . . . . . . . . -65 to +150 Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not recommended. NOTES: (1) Tested according to JEDEC standard JESD22-A114. (2) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB per JESD51 standards. Electrical Characteristics Unless otherwise specified: VIN= 3.6V, CIN= 4.7µF, COUT=10µF, LX=1µH, VOUT=2.0V, TJ(MAX)=125°C, TA= -40 to +85 °C. Typical values are TA=+25 °C Parameter Symbol Condition Min Typ Max Units Output Voltage Range Output Voltage Tolerance Line Regulation Load Regulation Output Current Capability Current Limit Threshold Foldback Current Limit Under-Voltage Lockout VOUT VOUT_TOL ΔVLINEREG ΔVLOADREG IOUT ILIMIT IFB_LIM VUVLO IOUT = 200mA 2.9 ≤ VIN ≤ 5.5V, IOUT = 200mA 200mA ≤ IOUT ≤ 500mA ILOAD > ILIMIT Rising VIN Hysteresis 0.8 -2.0 500 800 3.3 (1) V 2.0 % 0.3 %/V -1 %/A mA 1300 mA 150 mA 2.9 V 200 mV Quiescent Current Shutdown Current LX Leakage Current High Side Switch Resistance(2) Low Side Switch Resistance(3) Switching Frequency IQ ISD ILX RDSON_P RDSON_N fSW IOUT = 0mA VCTL 0-3= 0V Into LX pin IOUT= 100mA IOUT= 100mA 4.8 mA 0.1.


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