Click here to ask about the production status of specific part numbers. MAX17577, MAX17578 4.5V to 60V, 1A High-Efficiency, Synchronous, Inverting Output DC-DC Converters General Description Benefits and Features The Himalaya series of voltage regulator ICs, power mod- Reduces External Components and Total Cost ules, and chargers enable cooler, smaller, and simpler Synchronous Operation power-supply solutions. The MAX17577 and MAX17578 All-Ceramic Capacitors, Compact Layout are high-efficiency, high-voltage, inverting, Himalaya syn- Internal Loop Compensation chronous DC-DC converters with integrated MOSFETs System Ground Referenced I/O Pins (EN/UVLO, and internal compensation. The devices generate output RESET) voltages (V ) from -0.9V to -36V and can deliver up to OUT Flexibility to Support Multiple Rails in a System 1A of load current from a wide 4.5V to (60V - V ) in- OUT Adjustable Output Voltage Range from -0.9V to put-voltage range. -36V The devices feature peak current-mode control architec- Wide 4.5V to (60V - V ) Input-Voltage Range OUT ture. The MAX17577 operates in continuous conduction Up to 1A Output Current mode (CCM) at all loads thus, providing a constant fre- 400kHz to 2.2MHz Adjustable Frequency with quency operation. The MAX17578 operates in discontinu- External Clock Synchronization ous conduction mode (DCM) for superior efficiency at light Reduces Power Dissipation loads. Low minimum on-time allows higher switching fre- 90.6% Peak Efficiency quencies and small solution sizes. DCM for Superior Light-Load Efficiency The devices allow the EN/UVLO, RESET, and RT/SYNC 6.2A Shutdown Current pins to be driven by signals that are referenced to system Operates Reliably in Adverse Industrial Environments ground, eliminating the need for external-level shifter cir- Hiccup-Mode Overload Protection cuits. The feedback-voltage regulation accuracy is 1.3% Adjustable Soft-Start over a wide -40C to +125C temperature range. The de- Monotonic Startup with Prebiased Output Voltage vices are available in a compact 12-pin (3mm x 3mm) Built-In Output-Voltage Monitoring with RESET TDFN package. Simulation models are available. Programmable EN/UVLO Threshold Overtemperature Protection Applications Wide -40C to +125C Ambient Operating Industrial Control Power Supply Temperature Range/ -40C to +150C Junction General-Purpose Point-of-Load Temperature Range Gate-Drive Circuits Motion Control Ordering Information appears at end of data sheet. Wall-Transformer Regulation High-Voltage, Single-Board System Simplified Application Circuit IN RESET V IN EN/UVLO BST MAX17577/ MAX17578 RT/SYNC LX V FB CC FB SS GND FB SOUT EP OUT VOUT 19-100840 Rev 0 10/20MAX17577, 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 V + 0.3V Output Short-Circuit Duration......................................Continuous IN RESET to GND...................................................... -0.3V to +6.5V Continuous Power Dissipation (Multilayer Board) (T = +70C, A LX to OUT ................................................... -0.3V to (V + 0.3V) derate 24.4mW/C above +70C) ................................1951.2mW IN RESET, BST to OUT.............................................. -0.3V to +70V Operating Temperature Range (Note 1) .............-40C to +125C BST to LX .............................................................. -0.3V to +6.5V Junction Temperature.......................................................+150C BST to V ............................................................. -0.3V to +65V Storage Temperature Range ..............................-65C to +150C CC FB, SS, V to SOUT ........................................... -0.3V to +6.5V Lead Temperature (soldering, 10s)...................................+300C CC RT/SYNC to SOUT................................................... -2V to +6.5V Soldering Temperature (reflow) ........................................+260C Note 1: Junction temperature greater than +125C 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 ( ) 33C/W JA Junction-to-Case Thermal Resistance ( ) 8.5C/W JC 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 (V = V = 24V, C = 2.2F, V = 1V, RT/SYNC = LX = SS = RESET = Open, V to V = 5V, V = V = V IN EN/UVLO VCC FB BST LX GND SOUT OUT = 0V, T = -40C to +125C. Typical values are at T = +25C. All voltages are referenced to SOUT, unless otherwise noted.) (Note 3) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS INPUT SUPPLY (IN) 60 - Input-Voltage Range V (Referred to GND) 4.5 V IN GND V OUT V = 0V (referred to GND), EN/UVLO Input-Shutdown Current I 6.2 10 A IN-SH shutdown mode MAX17577, Normal Switching Mode 6.3 No-Load Input Current I mA NO LOAD MAX17578 1.5 2 ENABLE/UNDERVOLTAGE LOCKOUT (EN/UVLO) V V rising (referred to GND) 1.165 1.229 1.275 ENR EN/UVLO EN/UVLO Threshold V V V falling (referred to GND) 1.04 1.09 1.14 ENF EN/UVLO EN/UVLO Input- I V = GND, T = +25C -50 0 +50 nA ENLKG EN/UVLO A Leakage Current www.maximintegrated.com Maxim Integrated 2