max5093 Maxim Integrated Products, Inc., max5093 Datasheet
max5093
Available stocks
Related parts for max5093
max5093 Summary of contents
Page 1
... Both LDO and boost output voltages are programmable using external resistors. The boost pre- regulator output voltage is adjustable up to 11V (MAX5092_ 12V (MAX5093_). The LDO output voltage is adjustable from 1. (MAX5092_) or from 1.5V to 10V (MAX5093_). The devices feature a shutdown mode with 5µA (typ) ...
Page 2
... BSOUT falling (Note 5) BSOUT – BST_EN OUT V V rising (Note 5) BSOUT – BST_DIS OUT BST_HYS 4V, BSFB = SGND, V BSOUT IN MAX5092_ MAX5093_ V BSFB I BSFB R DS(ON) t OFF = +70° 1µ -40°C to +125°C, unless otherwise A J MIN TYP MAX 4 72 3.0 3 ...
Page 3
... DO OUT Rising edge the rising edge of BSOUT 500Ω, SET = SGND OUT L 7V ≤ V ≤ 72V, MAX5092A/MAX5093A IN / OUT I = 10mA MAX5092B/MAX5093B LOAD Δ ≤ V ≤ 28V 250mA IN LOAD V SET I SET / OUT I = 1mA to 250mA OUT ΔI OUT ...
Page 4
Input LDOs with Boost Preregulator ELECTRICAL CHARACTERISTICS (continued 14V 1mA 47µ OUT IN noted. See Figures 4–7 as applicable. Typical specifications are at T PARAMETER SYMBOL ...
Page 5
... BOOST CONVERTER NOT SWITCHING, QUIESCENT SUPPLY CURRENT = 10mA OUT OUT 50 40 7.0 -40 - TEMPERATURE (°C) SHUTDOWN SUPPLY CURRENT vs. INPUT VOLTAGE (MAX5093B INPUT VOLTAGE (V) SWITCHING WAVEFORMS V PROGRAMMED < BSOUT OUT ...
Page 6
Input LDOs with Boost Preregulator ( 14V 47µ BSOUT applicable.) LINE-TRANSIENT RESPONSE (V STEP FROM 4V TO 7V) IN MAX5092/93 toc09 I OUT V OUT 50mV/div V IN ...
Page 7
Input LDOs with Boost Preregulator ( 14V 47µ BSOUT applicable.) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 8V -70 100 1k 10k 100k FREQUENCY (Hz) ...
Page 8
Input LDOs with Boost Preregulator ( 14V 47µ BSOUT applicable.) V vs. TEMPERATURE OUT 3.36 3.34 3.32 3.30 3.28 3. 10mA 100kΩ, OUT R4 ...
Page 9
... Inductor Connection to the Drain of the Internal Power MOSFET. Connect LX to the switched side of the 10 inductor. Connect pins 10 and 11 together as close to the device as possible. For the MAX5093, also connect LX to the anode of the external Schottky diode. Boost Regulator Power Ground. Connect PGND_BST to the power ground plane. Connect the PGND_BST ...
Page 10
Input LDOs with Boost Preregulator MAX5092_ ONE-SHOT OUT 2.25μs ONE-SHOT OUT IN BSOUT V DIS_TH BST_DIS OUT HOLD CONTROL LOGIC, THERMAL SHUTDOWN, AND OVERCURRENT EN PROTECTION CT COMPARATOR 0. REF Figure 1. MAX5092_ Functional Diagram ...
Page 11
... MAX5093_ ONE-SHOT OUT 2.25μs ONE-SHOT OUT IN BSOUT V DIS_TH BST_DIS OUT HOLD CONTROL LOGIC, THERMAL SHUTDOWN, AND OVERCURRENT EN PROTECTION CT COMPARATOR 0. REF Figure 2. MAX5093_ Functional Diagram ______________________________________________________________________________________ Functional Diagrams (continued) IN 1μs INTERNAL LDO DRIVER R Q CURRENT-LIMITING COMPARATOR REF V REF VL 2μ ...
Page 12
... BSOUT. The rea- rises above BSOUT OUT BST_DIS BSOUT falls the boost converter OUT BST_EN rises. For the lowest V BSOUT within the boost disable thresh- BSOUT is limited to 11V. Use the MAX5093_ for higher Linear Regulator ) section. OUT + OUT , the to fall. As BSOUT ...
Page 13
... Low Released Off 5 High X On ______________________________________________________________________________________ The MAX5092_/MAX5093_ utilize two logic inputs, EN (active-high) and HOLD (active low), to implement a self-holding circuit with no additional components. For is above 5.5V. example, an automotive ignition switch drives EN high and the regulator turns on. If HOLD is then driven low, is BSOUT the regulator remains on even if EN goes low ...
Page 14
Input LDOs with Boost Preregulator INPUT 4V TO 72V C1* 47μF VOUT RESET ON OFF *** P *THESE CAPACITORS MUST BE RATED AT THE HIGHEST V **OUTPUT CURRENT IS LIMITED BY THE TOTAL POWER-DISSIPATION CAPABILITY OF THE ...
Page 15
... RESET ON OFF *** P *THESE CAPACITORS MUST BE RATED AT THE HIGHEST V **OUTPUT CURRENT IS LIMITED BY THE TOTAL POWER-DISSIPATION CAPABILITY OF THE PACKAGE. ***SEE PCB LAYOUT GUIDELINES SECTION. Figure 5. MAX5093B Typical Application Circuit with Factory Preprogrammed Boost and LDO Output Voltages ______________________________________________________________________________________ Applications Information (continued) L1 4.7μ ...
Page 16
Input LDOs with Boost Preregulator INPUT 4V TO 72V C1* 47μF VOUT RESET ON OFF *** P *THESE CAPACITORS MUST BE RATED AT THE HIGHEST V **OUTPUT CURRENT IS LIMITED BY THE TOTAL OUTPUT POWER AND THE ...
Page 17
... CAPACITORS MUST BE RATED AT THE HIGHEST V **OUTPUT CURRENT IS LIMITED BY THE TOTAL OUTPUT POWER AND THE DISSIPATION CAPABILITY OF THE PACKAGE. ***SEE PCB LAYOUT GUIDELINES SECTION. Figure 7. MAX5093A Typical Application Circuit with User-Programmable Boost Output Voltage and LDO Output Voltage ______________________________________________________________________________________ Applications Information (continued) ...
Page 18
... The IN where I OUT the BSOUT capacitance. The control scheme of the MAX5092/MAX5093 permits flexibility in choosing an inductor value. Smaller induc- tance values typically offer smaller physical size for a given series resistance, allowing the smallest overall circuit dimensions. Circuits using larger inductance may provide higher efficiency and exhibit less ripple, but also may reduce the maximum output current ...
Page 19
... OUT output. ______________________________________________________________________________________ Schottky Diode Selection (MAX5093_) ) The MAX5093_ requires an external diode connected BSOUT between LX and BSOUT (Figures 5 and 7). Proper selection of an external diode can offer a lower forward- voltage drop and a higher reverse-voltage handling capability. Since the high switching frequency of the IC ...
Page 20
... AMBIENT TEMPERATURE (°C) Figure 8. MAX5092/MAX5093 Package Power Dissipation Maximum Output Current (I The MAX5092_/MAX5093_ high input voltage (+72V max) provides up to 250mA of current from OUT. Package power-dissipation limits the amount of output current available for a given input/output voltage and ambient temperature. Figure 8 depicts the maximum power-dissipation curve for the devices ...
Page 21
... Input LDOs with Boost Preregulator INPUT 4V TO 72V VOUT RESET OUTPUT ENABLE * P *SEE PCB LAYOUT GUIDELINES SECTION. PRESET LDO PART OUTPUT (V) MAX5092AATE+ 3.3 MAX5092BATE+ 5 MAX5093AATE+ 3.3 MAX5093BATE+ 5 ______________________________________________________________________________________ MAX5092B BSOUT PGND_BST RESET EN SGND OUT_SENSE CT PGND_LDO ADJUSTABLE PRESET BSOUT LDO OUTPUT OUTPUT (V) ...
Page 22
Input LDOs with Boost Preregulator (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 22 ______________________________________________________________________________________ Package Information ...
Page 23
Input LDOs with Boost Preregulator (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Package Information (continued) 23 ...
Page 24
... Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products DESCRIPTION is a registered trademark of Maxim Integrated Products, Inc. Revision History PAGES CHANGED — ...