FP6357S5CTR

FP6357 High Efficiency 1.5MHz/a85T 1.2A fitipower integrated technology lnc. Synchronous Step Down Regulator Description Features The FP6357 is a high efficiency, high frequency synchronous DC-DC step-down converter. The 100% duty cycle feature provides low dropout operation, extending battery life in portable systems.  The internal synchronous switch increases efficiency and eliminates the need for external Schottky diode. At shutdown mode, the input supply current is less than 1µA. The current limit protection and on-chip thermal shutdown features provide protection against any combination of overload or ambient temperature.           Low RDS(ON) for Internal Switch (Top/Bottom): 200/150mΩ 2.5V~5.5V Input Voltage Range 1.2A Output Current High Efficiency up to 95% 1.5MHz Switching Frequency Minimizes the External Components Internal Soft-Start Limits the Inrush Current Internal Compensation Function 100% Dropout Operation Power Good Indicator Output (SOT-23-6 only) RoHS Compliant and Halogen Free SOT-23-5 and SOT-23-6 Packages Applications     Set Top Box LCD TV Mini-Notebook Net PC Pin Assignments Ordering Information S5 Package (SOT-23-5) FP6357□□□ FB TR: Tape/Reel VIN C: Green 5 4 (Marking) 1 2 3 Package Type S5: SOT-23-5 S6: SOT-23-6 EN GND LX S6 Package (SOT-23-6) FB PG VIN 6 5 4 (Marking) 1 2 3 EN GND LX SOT-23-5 Marking Part Number Product Code FP6357S5CTR Fi3 SOT-23-6 Marking Part Number Product Code FP6357S6CTR Fi4 Figure 1. Pin Assignment of FP6357 FP6357-Preliminary 0.1-MAY-2013 1 FP6357 /a85T fitipower integrated technology lnc. Typical Application Circuit OFF ON EN L1 VIN VIN C1 LX FP6357 R3 PG PG VOUT R1 C3 C2 (opt.) FB GND R2 Figure 2. Schematic Diagram VOUT 3.3V 2.5V 1.8V 1.5V 1.2V 1.05V C1 4.7μF MLCC 4.7μF MLCC 4.7μF MLCC 4.7μF MLCC 4.7μF MLCC 4.7μF MLCC R1 453kΩ 316kΩ 200kΩ 150kΩ 100kΩ 75kΩ R2 100kΩ 100kΩ 100kΩ 100kΩ 100kΩ 100kΩ L1 μH μH 1.8μH 1.5μH 1.5μH 1.2μH C2 10μF MLCC 10μF MLCC 10μF MLCC 10μF MLCC 10μF MLCC 10μF MLCC Table 1. Recommended Component Values FP6357-Preliminary 0.1-MAY-2013 2 FP6357 /a85T fitipower integrated technology lnc. Functional Pin Description Pin Name Pin No. (SOT-23-5) Pin No. (SOT-23-6) EN 1 1 Enable Control. Pull high to turn the IC on, and pull low to disable the IC. GND 2 2 Ground Pin. LX 3 3 Inductor connection to the drains of the internal power MOSFETs. VIN 4 4 Power Supply Input Pin. Drive VIN pin by 2.5V to 5.5V voltage to power on the chip. FB 5 6 Voltage Feedback Input Pin. Connect FB and VOUT with a resistive voltage divider. This IC senses feedback voltage via FB and regulates it at 0.6V. PG -- 5 Open Drain Power Good Output Pin. (SOT-23-6 only) Pin Function Block Diagram PG (SOT-23-6) Power Good EN VIN Undervoltage Lockout Bias Supply 1M Enable Control Slope Compensation 90% VREF FB COMP EA Control Logic Current Limit Logic Control and Driver Logic 1 X LX Compensation VREF Soft Start Oscillator GND Figure 3. Block Diagram of FP6357 FP6357-Preliminary 0.1-MAY-2013 3 fitipower integrated technology lnc. Absolute Maximum Ratings (Note 1) FP6357 /a85T ● VIN to GND ------------------------------------------------------------------------------------------------------ -0.3V to +6.5V ● LX to GND ------------------------------------------------------------------------------------------------------- -0.3V to (VIN+0.3) ● Dynamic LX voltage in 50ns duration ------------------------------------------------------------------ -4V to (VIN+3V) ● EN, FB, PG to GND ------------------------------------------------------------------------------------------- -0.3V to VIN ● Package Thermal Resistance (θJA) SOT-23-5 --------------------------------------------------------------------------------------------- 250ºC/W SOT-23-6 --------------------------------------------------------------------------------------------- 250ºC/W ● Package hermal esistance (θJC) SOT-23-5 --------------------------------------------------------------------------------------------- 130°C/W SOT-23-6 --------------------------------------------------------------------------------------------- 110°C/W ● Maximum Junction Temperature (TJ) --------------------------------------------------------------------- +150°C ● Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------- +260°C ● Storage Temperature (TSTG) --------------------------------------------------------------------------------- -65°C to +150℃ Note 1：Stresses beyond those listed under “Absolute Maximum atings" may cause permanent damage to the device Recommended Operating Conditions (Note 2) ● Supply Voltage VIN --------------------------------------------------------------------------------------------- +2.5V to +5.5V ● Junction Temperature Range ---------------------------------------------------------------------------- -40°C to +125°C ● Ambient Temperature Range ----------------------------------------------------------------------------- -40°C to +85°C Note 2：The device is not guaranteed to function outside its operating conditions. FP6357-Preliminary 0.1-MAY-2013 4 FP6357 /a85T fitipower integrated technology lnc. Electrical Characteristics (VIN=5V, TA=25°C, unless otherwise specified.) Parameter Input Voltage Range Symbol VIN Shutdown Current ISHDN Quiescent Current Iq Reference Voltage VREF FB Input Leakage Current P-Channel MOSFET On-Resistance (Note 3) N-Channel MOSFET On-Resistance (Note 3) Conditions IFB Min Typ 2.5 EN=GND 0.1 VFB=0.65V, IO=0A 80 0.588 VFB=VIN Max Unit 5.5 V 1 μA μA 0.6 0.612 V 0.01 1 µA RDS(ON) 200 mΩ RDS(ON) 150 mΩ P-Channel Current Limit (Note 3) ILIM 1.5 A EN High-Level Input Voltage VIH 1.5 V EN Low-Level Input Voltage VIL Under Voltage Lockout Voltage 0.4 V UVLO 2.4 V UVLO Hysteresis VHYS 0.2 V Oscillation Frequency FOSC 1.2 Minimum On Time 50 Maximum Duty Cycle PG Rising Threshold (SOT-23-6) PG Sink Current (SOT-23-6) 1.5 100 1.8 MHz ns % VPG (H) VFB Rising 90 % IPG VPG=0.1V 1 mA 100 Ω VOUT Discharge Resistance Thermal Shutdown Temperature (Note 3) TSD 150 °C Internal Soft-Start Time TSS 1 ms Note 3：Guarantee by design. FP6357-Preliminary 0.1-MAY-2013 5 FP6357 /a85T fitipower integrated technology lnc. Outline Information SOT-23-5 Package (Unit: mm) SYMBOLS UNIT A DIMENSION IN MILLIMETER MIN MAX 0.90 1.45 A1 0.00 0.15 A2 0.90 1.30 B 0.30 0.50 D 2.80 3.00 E 2.60 3.00 E1 1.50 1.70 e 0.90 1.00 e1 1.80 2.00 L 0.30 0.60 Note：Followed From JEDEC MO-178-C. Carrier Dimensions FP6357-Preliminary 0.1-MAY-2013 6 FP6357 /a85T fitipower integrated technology lnc. Outline Information (Continued) SOT-23-6 Package (Unit: mm) SYMBOLS UNIT A DIMENSION IN MILLIMETER MIN MAX 0.90 1.45 A1 0.00 0.15 A2 0.90 1.30 B 0.30 0.50 D 2.80 3.00 E 2.60 3.00 E1 1.50 1.70 e 0.90 1.00 e1 1.80 2.00 L 0.30 0.60 Note：Followed From JEDEC MO-178-C. Carrier Dimensions Life Support Policy Fitipower’s products are not authorized for use as critical components in life support devices or other medical systems. FP6357-Preliminary 0.1-MAY-2013 7