Datasheet MAX17579, MAX17580 (Analog Devices) - 3

link to page 4 MAX17579/MAX17580 4.5V to 60V, 300mA High-Efficiency, Synchronous, Inverting Output DC-DC Converters
Electrical Characteristics
(VIN = VEN/UVLO = 24V, CVCC = 2.2μF, VFB = 1V, RT/SYNC = LX = SS = RESET = Open, VBST to VLX = 5V, VGND = VSOUT = VOUT = 0V, TA = -40°C to +125°C. Typical values are at TA = +25°C. All voltages are referenced to SOUT, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS INPUT SUPPLY (IN)
60 - Input-Voltage Range VIN (Referred to GND) 4.5 V |VOUT| V Input-Shutdown Current I EN/UVLO = 0V (referred to GND), IN-SH 6.2 10 μA shutdown mode MAX17579, Normal Switching Mode 3.6 No-Load Input Current INO-LOAD mA MAX17580 1.5 2.1
ENABLE/UNDERVOLTAGE LOCKOUT (EN/UVLO)
V EN/UVLO Threshold ENR VEN/UVLO rising (referred to GND) 1.165 1.229 1.275 V VENF VEN/UVLO falling (referred to GND) 1.04 1.09 1.14 EN/UVLO Input- I Leakage Current ENLKG VEN/UVLO = GND, TA = +25°C -50 0 +50 nA
LDO (VCC)
1mA < I V VCC < 15mA 4.75 5 5.25 CC Output Voltage VCC V 6V ≤ VIN ≤ 60V; IVCC = 1mA 4.75 5 5.25 VCC Current Limit IVCC_MAX VCC = 4.3V, VIN = 6.5V 25 60 100 mA VCC Dropout VCC_DO VIN = 4.5V, IVCC=15mA 0.35 V V V CC_UVR VCC rising 4.05 4.2 4.3 CC UVLO V VCC_UVF VCC falling 3.65 3.8 3.9
HIGH-SIDE AND LOW-SIDE MOSFETS
High-Side nMOSFET R On-Resistance DS-ONH ILX = 0.3A, Sourcing 0.975 1.95 Ω Low-Side nMOSFET R On-Resistance DS-ONL ILX = 0.3A, Sinking 0.443 0.88 Ω V LX Leakage Current I LX = (VOUT + 1V) to (VIN - 1V), TA = LXLKG -2 +2 μA +25°C
SOFT-START (SS)
Charging Current ISS VSS = 0.5V 4.7 5 5.3 μA
FEEDBACK (FB)
FB Regulation Voltage VFB-REG 0.888 0.9 0.912 V FB Input-Bias Current IFB 0 ≤ VFB ≤ 1V, TA = +25°C -50 +50 nA
CURRENT LIMIT
Peak Current-Limit I Threshold PEAK-LIMIT 0.715 0.803 0.883 A Runaway Current-Limit IRUNAWAY- 0.8 0.893 1 A Threshold LIMIT Sink Current-Limit MAX17579 -0.42 I A Threshold SINK-LIMIT MAX17580 0 www.analog.com Analog Devices | 3 Document Outline General Description Applications Benefits and Features Simplified Application Circuit Absolute Maximum Ratings Package Information TDFN-EP Electrical Characteristics Electrical Characteristics (continued) Typical Operating Characteristics Typical Operating Characteristics (continued) Pin Configuration MAX17579, MAX17580 Pin Description Functional Diagrams MAX17579/MAX17580 Block Diagram Detailed Description Switching Frequency and External Clock Synchronization Linear Regulator (VCC) Operating Input-Voltage Range Overcurrent Protection (OCP)/Hiccup Mode RESET Output Prebiased Output Thermal-Shutdown Protection Applications Information Inductor Selection Load Current Capability (IOUT(MAX)) Input Capacitor Selection Output Capacitor Selection Soft-Start Capacitor Selection Adjusting Output Voltage Setting the Input Undervoltage-Lockout Level Soft-Start Inductive Output Short-Circuit Protection Power Dissipation PCB Layout Guidelines Typical Application Circuits -5V Typical Application Circuits Typical Application Circuits (continued) -15V Typical Application Circuit Ordering Information Revision History