FP6360 FITIPOWER | Alldatasheet
Document overview
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Technical content
Features
Synchronous Rectification: Approach 95% Efficiency 2.5V to 5.5V Input Voltage Range Real Shutdown Isolated Load from Battery Internal Compensation without External Capacitors and Resistors No Schottky Diode Required Low Dropout Operation: 100% Duty Cycle Fixed Frequency Operation at 1.5MHz Very Low Shutdown Current at 0.1µA RoHS Compliant
Applications
Cellular Phone Handheld Instrument Wireless LAN MP3 Portable Audio Player Battery Operated Device G: Green TR: Tape/Reel FP6360□□□□ Package Type WD: TDFN-6 (2mm×2mm) WQ: TQFN-16 (3mmX3mm) Output Voltage Blank: Adjustable -16: 1.6V
fitipower integrated technology lnc. Figure 4. Block Diagram of FP6360
4 FP6360-1.4-MAY-2013 FP6360 fitipower integrated technology lnc. Preliminary Absolute Maximum Ratings
- Power Dissipation @25℃, (PD)
- Package Thermal Resistance, (θJA)
- Package Thermal Resistance, (θJC) Note 1：Stresses beyond those listed under “Absolute Maximum Ratings" may cause permanent damage to the device. Recommended Operating Conditions
5 FP6360-1.4-MAY-2013 FP6360 fitipower integrated technology lnc. Preliminary
Electrical Characteristics
(VIN=3.6V, EN=VIN, TA= 25º C, unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit Operating Input Voltage VIN 2.5 5.5 V Quiescent Current IQ VFB=0.63V or VOUT=105%, IO=0mA 50 70 µA Shutdown Current ISD EN=GND 0.1 1 EN High-Level Input Voltage VIH 1.3 V EN Low-Level Input Voltage VIL 0.4 V EN Input Leakage Current ILKG EN=GND or VIN 0.01 1 µA N-Channel MOSFET On-Resistance (Note2) RDS(ON) ILX = 100mA 250 300 mΩ P-Channel MOSFET On-Resistance (Note2) RDS(ON) ILX = 100mA 280 330 mΩ Oscillator Frequency fs 1500 kHz P-Channel Current Limit (Note2) ILIM VFB=0.5V 1.4 1.5 A Under Voltage Lock Out Voltage UVLO 1.8 V UVLO Hysteresis VHYS 0.1 V FB Input Leakage Current IFB VFB= VIN 0.01 1 µA LX Leakage Current VIN=3.6V, VLX=0V or VLX=3.6V -1 1 µA Reference Voltage VREF 0.588 0.6 0.612 V Output Voltage Accuracy (Fix) △ VOUT -2 +2 % Line Regulation △ VLINE VIN =VO+0.5V to 5.5V; IO = 10mA 0.05 %/V Load Regulation △ VLOAD IO = 10mA to 1A 0.8 %/A Thermal Shutdown Temperature (Note2) TSD 160 °C ΔTSD Hysteresis 20 °C Note 2：Guarantee by design.
9 FP6360-1.4-MAY-2013 FP6360 fitipower integrated technology lnc. Preliminary
Application Information
A 2.2µH to 4.7µH is recommended for general used. The value of inductor depends on the operating frequency. Higher frequency allows smaller inductor and capacitor but increase s internal switching loss. Two inductor parameters should be considered, current rating and DCR. The inductor with the lowest DCR is chosen for the highest efficiency. The inductor value can be calculated as: T T IL: inductor ripple current, which is defined as: MAXO I O OL I21.0 )]f*L/()V V1[(VI (General Setting) The inductor should be rated for the maximum output current (IO-MAX) plus the inductor ripple current ( L) to avoid saturation. The maximum inductor current (IL-MAX) is given by: MA MA Capacitor Selection The small size of ceramic capacitors are ideal for FP6360 applications. X5R and X7R types are recommended because they retain their capacitance over wider voltage and temperature ranges than other types , such as Y5V or Z5U. A 4.7 μF input capacitor and a 0μF output capacitor are su icient for most FP6360 applications. When selecting an output capacitor, consider the output ripple voltage and the ripple current. The ESR of capacitor is a major factor to the output ripple. For the best performance, a low ESR output capacitor is required. The ripple voltage is given by: SR Output Voltage Programming (Adjustable Voltage Version) The output voltage of FP6360 is set by the resistor divider according to the following formula: T F R R R1 is the upper resistor of the voltage divider. For transient response reasons, a small feed -forward capacitor (C F) is required in parallel to the upper feedback resistor, and 33pF is recommended. Checking Transient Response The regulator loop response can be checked by looking at the load transient response. Switching regulators take several cycles to respond to a step in load current. When a load step occurs, VOUT will be shifted immediately by an amount equal to (Δ LOAD • SR), where SR is the e ective series resistance of COUT. Δ LOAD will also begin to charge or discharge C OUT, which generates a feedback error signal. Then t he regulator loop will act to return V OUT to its steady state value. During this recovery time, VOUT can be monitored for overshoot or ringing that will indicate the stability problem. The discharged bypass capacitors are effectively put in parallel with C OUT, causing a rapidly drop in VOUT. No regulator can deliver enough current to prevent this problem if the load switch resistance is low and it is driven quickly. The only solution is to limit the rise time of the switch drive, so that the load rise time will be limited to approximate ly ( 5 • CLOAD). Current Mode PWM Control Slope compensated current mode PWM control provides stable switching , cycle-by-cycle current limit for superior load , line response, protection of the internal main switch and synchronous rectifier. The FP6360 switches at a constant frequency (1.5MHz) and regulates the output voltage. During each cycle , the PWM comparator modulates the power transferred to the load by changing the inductor peak current based on the feedback error voltage. During normal operation, the main switch is turned on for a certain time to ramp the inductor current at each rising edge of the internal oscillator, and switched off when the peak inductor current is above the error voltage. When the main switch is off, the synchronous rect ifier will be turned on immediately and stay on until next cycle starts. Dropout Operation The FP6360 allows the main switch to remain on for more than one switching cycle , and increases the duty cycle while the input voltage is dropping close to the outpu t voltage. When the duty cycle reaches 100%, the main switch will be held on continuously to deliver current to the output up to the MOSFET current limit. Then the output voltage will be the input voltage minus the voltage drop across the main switch and the inductor.
10 FP6360-1.4-MAY-2013 FP6360 fitipower integrated technology lnc. Preliminary Outline Information TDFN-6 2mm×2mm Package (Unit: mm) SYMBOLS UNIT DIMENSION IN MILLIMETER MIN MAX A 0.70 0.80 A1 0.00 0.05 A2 0.19 0.22 D 1.95 2.05 E 1.95 2.05 a 0.20 0.40 b 0.25 0.35 e 0.60 0.70 D1 1.15 1.65 E1 0.55 1.05 Carrier Dimensions
11 FP6360-1.4-MAY-2013 FP6360 fitipower integrated technology lnc. Preliminary Outline Information (Continued) TQFN-16 3mmx3mm Package (Unit: mm) SYMBOLS UNIT DIMENSION IN MILLIMETER MIN MAX A 0.70 0.80 A1 0.00 0.05 C 0.19 0.30 E 2.90 3.10 D 2.90 3.10 L 0.35 0.45 b 0.18 0.30 e 0.45 0.55 E2 1.50 1.80 D2 1.50 1.80 Carrier Dimensions Life Support Policy Fitipower’s products are not authorized or use as critical components in li e support devices or other medical systems