MIC23356 3A, Step-Down Converter 2 with HyperLight Load and I C Interface Features General Description Input Voltage Range: 2.4V to 5.5V The MIC23356 is a high-efficiency, low-voltage input, 3A synchronous step-down regulator. The Con- 3A Continuous Output Current 2 stant-ON-Time (COT) control architecture with Multiple Faults Indication through I C HyperLight Load provides very high efficiency at light 2 I C Programmable: loads, while still having ultra-fast transient response. - Output Voltage: 0.6V - 1.28V, 5 mV 2 The I C interface allows programming the output volt- Resolution or 0.6V - 3.84V, 10/20 mV age between 0.6V and 1.28V, with 5 mV resolution or Resolution between 0.6V and 3.84V, with 10 mV and 20 mV reso- - Slew Rate: 0.2 ms/V - 3.2 ms/V lution. Three different default voltage options (0.6V, - ON Time (Switching Frequency) 0.9V and 1.0V) are provided so that the application can - High-Side Current Limit: 3.5A - 5A be started with a safe voltage level and then moved to 2 high performance modes under I C control. - Enable Delay: 0.2 ms - 3 ms - Output Discharge when Disabled An open-drain Power Good output facilitates output (EN = GND) voltage monitoring and sequencing. If set in shutdown (EN=GND), the MIC23356 typically draws 1.5A, High Efficiency (up to 95%) while the output is discharged through 10 pull-down Ultra-Fast Transient Response (if the output discharge feature is enabled). 1.5% Output Voltage Accuracy Over The MIC23356 pinout is compatible with the Line/Load/Temperature Range MIC23350, so that applications can be easily Safe Start-Up with Pre-Biased Output converted. Typical 1.5 A Shutdown Supply Current The 2.4V to 5.5V input voltage range, low shutdown Low Dropout (100% Duty Cycle) Operation and quiescent currents make the MIC23356 ideal for 2 I C Speed up to 3.4 MHz single-cell Li-Ion battery-powered applications. The Latch-Off Thermal Shutdown Protection 100% duty cycle capability provides low dropout Latch-Off Current Limit Protection operation, extending operating range in portable Power Good (PG) Open-Drain Output systems. The MIC23356 is available in a thermally efficient, Applications 16-Lead 2.5 mmx2.5 mmx0.55 mm thin FTQFN package, with an operating junction temperature range Solid State Drives (SSD) from -40C to +125C. FPGAs, DSP and Low-Voltage ASIC Power 2019 Microchip Technology Inc. DS20006130A-page 1MIC23356 Typical Application / 6 Q+ ) 6: 9 7 9 3 9 7 9 WR 9 ) ) 0,& 3 (1 (1 %/( 6 3* 3 , & 6&/ Package Types MIC23356 Top View 16-pin FTQFN 2.5 mm x 2.5 mm 16 15 14 13 SW 1 A 12 GND P 11 2 V GND EP OUT 17 P 3 10 PG GND P 9 4 EN VIN 56 7 8 * Includes Exposed Thermal Pad (EP) see Table 3-1. Ordering Information Default Status at Power-Up Output Voltage Output High-Side TON<1:0> - Soft-Start Overtemp Output Part Number Range/Step Voltage Current Limit ns Speed Latch-Off Pull-Down (typical) when Disabled MIC23356YFT 0.6 V 3.5 A 00 - 260 ns 200 s/V Immediate NO 0.600V-1.280V/ Latch-Off 5mV MIC23356-HAYFT 1.0 V 5 A 10 - 130 ns 800 s/V Latch-Off YES 0.600V-1.280V/ after 4 OT 5mV cycles MIC23356-FAYFT 0.9 V 5 A 10 - 130 ns 800 s/V Latch-Off YES 0.600V-1.280V/ after 4 OT 5mV cycles MIC23356-SAYFT 1.0 V 5 A 10 - 130 ns 800 s/V Latch-Off YES 0.600V-1.280V/ after 4 OT 10 mV cycles 1.280V-3.840V/ 20 mV 2019 Microchip Technology Inc. DS20006130A-page 2 PV SW IN SV P IN GND SCL P GND P SDA GND *22 *1 *1 & & 28 9,1 ,1 28 & 9,1