MAX5035DASA-T Maxim Integrated Products, MAX5035DASA-T Datasheet
MAX5035DASA-T
Related parts for MAX5035DASA-T
MAX5035DASA-T Summary of contents
Page 1
... VD OFF SGND GND 0.1μF ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Step-Down DC-DC Converter ♦ Wide 7.5V to 76V Input Voltage Range ♦ Fixed (3.3V, 5V, 12V) and Adjustable (1.25V to 13.2V) Versions ♦ ...
Page 2
High-Efficiency MAXPower Step-Down DC-DC Converter ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND, unless otherwise specified.) V .........................................................................-0.3V to +80V IN SGND ....................................................................-0.3V to +0.3V LX.................................................................-0. BST ...............................................................-0. BST (transient < 100ns) ................................-0. ...
Page 3
High-Efficiency MAXPower ELECTRICAL CHARACTERISTICS (continued) (MAX5035_U_ +12V +12V ON/OFF OUT Typical Application Circuit. ) PARAMETER SYMBOL PFM Threshold FB Input Bias Current ON/OFF CONTROL INPUT ON/OFF Input-Voltage Threshold ...
Page 4
High-Efficiency MAXPower Step-Down DC-DC Converter ELECTRICAL CHARACTERISTICS (MAX5035_A_ _) (continued +12V +12V ON/OFF OUT the Typical Application Circuit. ) (Note 2) PARAMETER SYMBOL Efficiency Quiescent Supply Current Shutdown Current ...
Page 5
... I (mA) LOAD = +25°C. See the Typical A LINE REGULATION (MAX5035AASA, V OUT 3. 0.1A OUT 3. OUT 3.32 3.28 3.24 3.20 125 150 INPUT VOLTAGE (V) LOAD REGULATION (MAX5035DASA, V OUT 5.10 5. 7. 76V IN 4.95 4.90 1000 0 200 400 600 I (mA) LOAD = 3.3V 5V) = 24V 800 1000 ...
Page 6
... MAX5035DASA V 5% DROP IN VOUT 0.5 150 INPUT VOLTAGE (V) SHUTDOWN CURRENT vs. TEMPERATURE -50 - 100 76 TEMPERATURE (°C) = +25°C. See the Typical A EFFICIENCY vs. LOAD CURRENT (MAX5035DASA, V OUT 100 15V 24V 48V 76V 200 400 600 1000 LOAD CURRENT (mA) QUIESCENT SUPPLY CURRENT vs. TEMPERATURE 350 ...
Page 7
... Typical Operating Characteristics (continued) MAX5035DASA LOAD-TRANSIENT RESPONSE MAX5035 toc17 OUT 15 400μs/div 200mV/div, AC-COUPLED OUT 500mA/div, 0. OUT MAX5035DASA LX WAVEFORMS MAX5035 toc20 A B 4μs/div A: SWITCH VOLTAGE (LX PIN), 20V/div (V = 48V INDUCTOR CURRENT, 500mA/div (I = 1A) OUT = +25°C. See the Typical A MAX5035DASA LOAD-TRANSIENT RESPONSE MAX5035 toc18 ...
Page 8
... Application Circuit , if applicable.) MAX5035DASA LX WAVEFORMS 4μs/div A: SWITCH VOLTAGE (LX PIN), 20V/div (V B: INDUCTOR CURRENT, 200mA/div (I MAX5035DASA STARTUP WAVEFORM ( 1ms/div 2V/div ON/OFF 2V/div OUT 8 _______________________________________________________________________________________ Typical Operating Characteristics (continued) MAX5035DASA STARTUP WAVEFORM MAX5035 toc22 48V OUT MAX5035 toc24 3.0 2.5 A 2.0 B 1.5 1 ...
Page 9
High-Efficiency MAXPower PIN NAME 1 BST Boost Capacitor Connection. Connect a 0.1μF ceramic capacitor from BST to LX Internal Regulator Output. Bypass VD to GND with a 0.1μF ceramic capacitor. 3 SGND Internal Connection. SGND must ...
Page 10
High-Efficiency MAXPower Step-Down DC-DC Converter Detailed Description The MAX5035 step-down DC-DC converter operates from a 7.5V to 76V input voltage range. A unique volt- age-mode control scheme with voltage feed-forward and an internal switching DMOS FET provides high ...
Page 11
High-Efficiency MAXPower The MAX5035 features internal compensation for opti- mum closed-loop bandwidth and phase margin. With the preset compensation strongly advised to sense the output immediately after the primary LC. Inductor Selection The choice of an ...
Page 12
High-Efficiency MAXPower Step-Down DC-DC Converter Ensure that the ripple specification of the input capaci- tor exceeds the worst-case capacitor RMS ripple cur- rent. Use the following equations to calculate the input capacitor RMS current − I ...
Page 13
High-Efficiency MAXPower ground configuration). A ground plane is required. Minimize lead lengths to reduce stray capacitance, trace resistance, and radiated noise. In particular, place the Schottky rectifier diode right next to the Figure 2. ...
Page 14
High-Efficiency MAXPower Step-Down DC-DC Converter Table 2. Typical External Components Selection (Circuit of Figure 2) (continued) V (V) V (V) IN OUT 3 3 ______________________________________________________________________________________ I (A) EXTERNAL ...
Page 15
High-Efficiency MAXPower Table 3. Component Suppliers SUPPLIER AVX Coilcraft Diodes Incorporated Panasonic SANYO TDK Vishay V IN 12V C IN 68μF *LOCATE PTC AS CLOSE TO HEAT-DISSIPATING COMPONENTS AS POSSIBLE. Figure 3. Load Temperature Monitoring with ON/OFF (Requires ...
Page 16
... MAX5035CUPA 0°C to +85°C MAX5035CASA -40°C to +125° 5035C AS A/V + -40°C to +125° MAX5035DUSA 0°C to +85°C MAX5035DUPA 0°C to +85°C MAX5035DASA -40°C to +125° 5035D AS A/V + -40°C to +125° Denotes lead(Pb)-free/RoHS-compliant package. 16 ______________________________________________________________________________________ MAX5035B FB R1 BST ...
Page 17
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 © 2010 Maxim Integrated Products ...