EVALUATION KIT AVAILABLE MAX5096/MAX5097 40V, 600mA Buck Converters with Low- Quiescent-Current Linear Regulator Mode General Description Features High-Efficiency Switcher Mode (Buck Mode) or Low- The MAX5096/MAX5097 easy-to-use, Dual Mode, Quiescent-Current Linear Regulator (LDO Mode) DC-DC converters operate as LDO (low dropout) or Operation switch-mode buck converters. At a high output load, Wide Operating Input Voltage Range the converters operate as high-efficiency pulse-width +5V to +40V Buck Mode modulated (PWM) switch-mode converters and reduce the power dissipation. The devices switch to a low- +4V to +40V LDO Mode quiescent-current (I ) LDO mode of operation at light Fixed 3.3V or 5V and Adjustable (1.24V to 11V) Q load. During the key-off condition, the systems microcon- Output Voltage Versions troller drives the LDO/BUCK input on the fly and forces 6A (typ) Shutdown Current the MAX5096/MAX5097 into LDO mode, thereby reduc- Fixed 135kHz or 330kHz Switching Frequency ing the quiescent current significantly. External Frequency Synchronization In Buck mode, the MAX5096/MAX5097 operate from a Programmable Soft-Start 5V to 40V input voltage range and deliver up to 600mA Integrated Microprocessor-Reset (RESET) Circuit of load current with excellent load and line regulation. with Programmable Timeout Period The fixed-switching frequency versions of 135kHz and Thermal and Short-Circuit Protection 330kHz are available. The MAX5096/MAX5097 DC-DC -40C to +125C Automotive Temperature Range internal oscillator can be synchronized to an external Thermally Enhanced Package Dissipates 2.6W at clock. External compensation and a current-mode control T = +70C (16-Pin TQFN) and 1.7W at T = +70C A A scheme make it easy to design with. (20-Pin TSSOP) In LDO mode, the MAX5096/MAX5097 operate from a 4V Ordering Information to 40V input voltage. The LDO mode operation is intended for a lower output load current of up to 100mA. The quies- PART TEMP RANGE PIN-PACKAGE cent current at 100A load in LDO mode is only 41A (typ). MAX5096AATE+ -40C to +125C 16 TQFN-EP* The MAX5096/MAX5097 feature an enable input that shuts down the device, reducing the current consump- MAX5096BATE+ -40C to +125C 16 TQFN-EP* tion to 6A (typ). Additional features include a power-on- MAX5096AAUP+ -40C to +125C 20 TSSOP-EP* reset output with a capacitor-adjustable timeout period, MAX5096BAUP+ -40C to +125C 20 TSSOP-EP* programmable soft-start, output tracking, output overload, MAX5097AATE+ -40C to +125C 16 TQFN-EP* short-circuit, and thermal-shutdown protections. MAX5097BATE+ -40C to +125C 16 TQFN-EP* The MAX5096/MAX5097 operate over the -40C to MAX5097AAUP+ -40C to +125C 20 TSSOP-EP* +125C automotive temperature range and are available in thermally enhanced 20-pin TSSOP or 16-pin TQFN MAX5097BAUP+ -40C to +125C 20 TSSOP-EP* packages. +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Applications Pin Configurations Industrial TOP VIEW TOP VIEW + 16 15 14 13 + IN 1 20 LX IN 2 19 LX PGND 1 12 EN IN 3 18 N.C. SGND 2 11 OUT PGND 4 MAX5096 17 EN MAX5096 MAX5097 SGND 5 16 OUT RESET 3 MAX5097 10 ADJ RESET 6 15 ADJ BP 4 9 LDO/BUCK BP 7 14 N.C. N.C. 8 13 LDO/BUCK 5 6 7 8 SYNC 9 12 COMP Dual Mode is a trademark of Maxim Integrated Products, Inc. SS 10 11 CT TQFN TSSOP 19-0603 Rev 4 1/15 SYNC IN SS IN CT LX COMP LXMAX5096/MAX5097 40V, 600mA Buck Converters with Low- Quiescent-Current Linear Regulator Mode Absolute Maximum Ratings (All voltages referenced to PGND, unless otherwise noted.) OUT Short-Circuit Duration .......................................Continuous IN (transient, 1ms) .................................................-0.3V to +45V Continuous Power Dissipation (T = +70C)* A SGND ...................................................................-0.3V to +0.3V 16-Pin TQFN (derate 33.3mW/C above +70C) .....2666mW LX ..................................................................-1V to (V + 0.3V) 20-Pin TSSOP (derate 21.7mW/C above +70C) ...1739mW IN LX Current ...............................................................................2A Operating Temperature Range ......................... -40C to +125C EN...............................................................-0.3V to (V + 0.3V) Junction Temperature ......................................................+150C IN BP, SYNC, LDO/BUCK, RESET to SGND ............-0.3V to +12V Storage Temperature Range ............................ -60C to +150C BP, RESET Output Current ................................................25mA Lead Temperature (soldering, 10s) .................................+300C CT, SS, ADJ, COMP to SGND ..................-0.3V to (V + 0.3V) BP *As per JEDEC 51 StandardMultilayer Board. OUT .......................................................................-0.3V to +11V Package Thermal Characteristics (Note 1) TQFN Junction-to-Ambient Thermal Resistance ( ) .........30.0C/W Junction-to-Case Thermal Resistance ( ) ..................1.7C/W JA JC TSSOP Junction-to-Ambient Thermal Resistance ( ) .........46.0C/W Junction-to-Case Thermal Resistance ( ) .....................2C/W JA JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Electrical Characteristics (V = +14V, I = 1mA, C = 100F, C = 22F, L = 22H, C = 1F, V = +2.4V, SGND = PGND = 0V, T = T = IN OUT IN OUT BP EN A J -40C to +125C, unless otherwise noted. Typical values are at T = T = +25C.) (Note 1) A J PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SYSTEM INPUT Input Voltage Range (LDO Mode) V LDO/BUCK = high 4 40 V IN LDO Input Voltage Range V LDO/BUCK = low 5 40 V IN BUCK (Buck Mode) Internal Input Undervoltage V V rising 3.5 3.65 3.9 V UVLO BP Lockout Internal Input Undervoltage- V V rising 0.2 V UVLO HYS BP Lockout Hysteresis BP (Internal Regulator) Output V V = +4.5V, I = 100A 3.75 4 4.20 V BP IN BP Voltage LDO/BUCK = high, measured at input supply T = -40C A I 38 70 Q return, V = 5V, to +125C OUT I = 100A OUT Quiescent Supply Current A (LDO Mode) LDO/BUCK = high, measured at input supply T = -40C A I 44 100 Q return, V = 5V, to +125C OUT I = 100mA OUT Buck Converter No-Load Supply I V = 14V, V = 5V, I = 0 680 A Q BUCK IN OUT OUT Current T = -40C to A 6 19 +125C V = 0V, measured from EN Shutdown Supply Current I A SHDN V IN T = -40C to A 6 12 +125C Maxim Integrated 2 www.maximintegrated.com