Datasheet MAX17577, MAX17578 (Maxim) - 2

link to page 4 MAX17577, MAX17578 4.5V to 60V, 1A High-Efficiency, Synchronous, Inverting Output DC-DC Converters
Absolute Maximum Ratings
IN, GND, EN/UVLO to OUT.. -0.3V to +65V OUT to SOUT .. -0.3V to +0.3V IN to GND ... -0.3V to +65V LX Total RMS Current..1.6A EN/UVLO to GND...-0.3V to VIN + 0.3V Output Short-Circuit Duration..Continuous RESET to GND.. -0.3V to +6.5V Continuous Power Dissipation (Multilayer Board) (TA = +70°C, LX to OUT ... -0.3V to (VIN + 0.3V) derate 24.4mW/°C above +70°C) ..1951.2mW RESET, BST to OUT .. -0.3V to +70V Operating Temperature Range (Note 1) ...-40°C to +125°C BST to LX .. -0.3V to +6.5V Junction Temperature ... +150°C BST to VCC... -0.3V to +65V Storage Temperature Range ..-65°C to +150°C FB, SS, VCC to SOUT ... -0.3V to +6.5V Lead Temperature (soldering, 10s)...+300°C RT/SYNC to SOUT... -2V to +6.5V Soldering Temperature (reflow) ..+260°C
Note 1:
Junction temperature greater than +125°C degrades operating lifetimes. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Package Information TDFN
Package Code TD1233+1C Outline Number 21-0664 Land Pattern Number 90-0397
THERMAL RESISTANCE, FOUR-LAYER BOARD (Note 2)
Junction-to-Ambient (θJA) 33ºC/W Junction-to-Case Thermal Resistance (θJC) 8.5ºC/W For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
Note 2:
Package thermal resistance was obtained using the MAX17578 evaluation kit with no airflow
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 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS INPUT SUPPLY (IN)
60 - Input-Voltage Range VIN_GND (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 MAX17577, Normal Switching Mode 6.3 No-Load Input Current INO_LOAD mA MAX17578 1.5 2
ENABLE/UNDERVOLTAGE LOCKOUT (EN/UVLO)
VENR VEN/UVLO rising (referred to GND) 1.165 1.229 1.275 EN/UVLO Threshold 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 www.maximintegrated.com Maxim Integrated | 2 Document Outline General Description Applications Benefits and Features Simplified Application Circuit Absolute Maximum Ratings Package Information TDFN Electrical Characteristics Electrical Characteristics (continued) Typical Operating Characteristics Typical Operating Characteristics (continued) Pin Configuration MAX17577, MAX17578 Pin Description Pin Description (continued) Functional Diagrams MAX17577/MAX17578 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 Inductive Output Short-Circuit Protection Power Dissipation PCB Layout Guidelines Typical Application Circuits -5V Typical Application Circuits Typical Application Circuits (continued) -12V Typical Application Circuit Ordering Information Revision History