EVALUATION KIT AVAILABLE MAX16907 36V, 2.2MHz Step-Down Converter with Low Operating Current General Description Features The MAX16907 is a 3A, current-mode, step-down con- S Wide 3.5V to 36V Input Voltage Range verter with an integrated high-side switch. The device is S 42V Input Transients Tolerance designed to operate with input voltages from 3.5V to 36V S High Duty Cycle During Undervoltage Transients while using only 30FA quiescent current at no load. The S 5V Fixed or 1V to 10V Adjustable Output Voltage switching frequency is adjustable from 1MHz to 2.2MHz by an external resistor and can be synchronized to an S Integrated 3A Internal High-Side (70mI typ) external clock. The output voltage is pin selectable to Switch be 5V fixed or adjustable from 1V to 10V. The wide input S Fast Load-Transient Response and Current-Mode voltage range along with its ability to operate at high duty Architecture cycle during undervoltage transients make the device S Adjustable Switching Frequency (1MHz to 2.2MHz) ideal for automotive and industrial applications. S Frequency Synchronization Input The device operates in skip mode for reduced current consumption in light-load applications. Protection fea- S 30A Standby Mode Operating Current tures include overcurrent limit, overvoltage, and thermal S 5A Typical Shutdown Current shutdown with automatic recovery. The device also S Spread Spectrum (Optional) features a power-good monitor to ease power-supply sequencing. S Overvoltage, Undervoltage, Overtemperature, and Short-Circuit Protections The device operates over the -40NC to +125NC automo- tive temperature range, and is available in 16-pin TSSOP and TQFN (5mm x 5mm) packages with exposed pads. Ordering Information appears at end of data sheet. Applications Automotive For related parts and recommended products to use with this part, Industrial/Military refer to: www.maximintegrated.com/MAX16907.related High-Voltage Input DC-DC Converter Point-of-Load Applications Typical Application Circuit V BAT C C IN1 IN2 C 47F 4.7F BST 0.1F SUP SUPSW L1 BST V EN OUT 2.2H 5V AT 3A LX FSYNC V OUT C OUT MAX16907 D1 22F COMP OUT C COMP1 V BIAS R FOSC 1000pF C COMP2 12kI V BIAS R 12pF COMP FOSC FB 20kI R PGOOD 10kI BIAS PGOOD POWER GOOD C BIAS GND 1F For pricing, delivery, and ordering information, please contact Maxim Direct at 19-5779 Rev 2 4/13 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com.MAX16907 36V, 2.2MHz Step-Down Converter with Low Operating Current ABSOLUTE MAXIMUM RATINGS SUP, SUPSW, LX, EN to GND ...............................-0.3V to +42V Continuous Power Dissipation (T = +70NC) A o SUP to SUPSW .....................................................-0.3V to +0.3V TSSOP (derate 26.1mW/ C above +70NC) .......... 2088.8mW* o BST to GND ...........................................................-0.3V to +47V TQFN (derate 28.6mW/ C above +70NC) ............ 2285.7mW* BST to LX ...............................................................-0.3V to +6V Operating Temperature Range ........................ -40NC to +125NC OUT to GND ..........................................................-0.3V to +12V Junction Temperature .....................................................+150NC FOSC, COMP, BIAS, FSYNC, I.C., PGOOD, Storage Temperature Range ............................ -65NC to +150NC FB to GND ............................................................-0.3V to +6V Lead Temperature (soldering, 10s) ................................+300NC o LX Continuous RMS Current ...................................................4A Soldering Temperature (reflow) ..................................... +260 C Output Short-Circuit Duration ....................................Continuous *As per the JEDEC 51 standard (multilayer board). Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional opera- tion 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 THERMAL CHARACTERISTICS (Note 1) TSSOP TQFN Junction-to-Ambient Thermal Resistance (B ) .......38.3NC/W Junction-to-Ambient Thermal Resistance (B ) ..........35NC/W JA JA Junction-to-Case Thermal Resistance (B ) .................3NC/W Junction-to-Case Thermal Resistance(B ) ...............2.7NC/W JC 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 = V = 14V, V = 14V, C = 1FF, R = 12kI, T = T = -40NC to +125NC, unless otherwise noted. Typical values SUP SUPSW EN BIAS FOSC A J are at T = +25NC.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V , SUP Supply Voltage Range 3.5 36 V V SUPSW Load-Dump Event Supply V t < 1s 42 V SUP LD LD Voltage I I = 1.5A 3.5 mA SUP LOAD Standby mode, no load, V = 5V 30 60 OUT Supply Current I FA SUP STANDBY Standby mode, no load, V = 5V, T OUT A 30 45 = +25C Shutdown Supply Current I V = 0V 5 12 FA SHDN EN BIAS Regulator Voltage V V = V = 6V to 36V 4.7 5 5.3 V BIAS SUP SUPSW BIAS Undervoltage Lockout V V rising 2.9 3.1 3.3 V UVBIAS BIAS BIAS Undervoltage-Lockout 400 mV Hysteresis Thermal-Shutdown Threshold +175 NC Thermal-Shutdown Threshold 15 NC Hysteresis Maxim Integrated 2 *The parametric values (min, typ, max limits) shown in the Electrical Characteristics table supersede values quoted elsewhere in this data sheet.