MAX1653EEE Maxim Integrated Products, MAX1653EEE Datasheet
MAX1653EEE
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MAX1653EEE Summary of contents
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... Quiescent Supply Current 3µA Logic-Controlled Shutdown Dual, N-Channel, Synchronous-Rectified Control Fixed 150kHz/300kHz PWM Switching, or Synchronized from 190kHz to 340kHz Programmable Soft Start Low-Cost Secondary Outputs (MAX1652/MAX1654) PART MAX1652EEE MAX1653ESE MAX1653EEE MAX1654EEE MAX1655ESE MAX1655EEE Applications PART MAX1652 MAX1653 MAX1654 MAX1655 Ordering Information TEMP ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP ABSOLUTE MAXIMUM RATINGS V+ to GND ..............................................................-0.3V to +36V GND to PGND .......................................................-0.3V to +0. GND ................................................................-0.3V to +6V BST to GND ............................................................-0.3V to +36V .....................................................-0.3V to ...
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ELECTRICAL CHARACTERISTICS (continued) (V+ = +15V, GND = PGND = 0V, SYNC = REF, I PARAMETER Reference Output Voltage No external load (Note 1) Reference Fault Lockout Voltage Falling edge Reference Load Regulation 0 < I SHDN = 0V, CSL ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP ELECTRICAL CHARACTERISTICS (continued) (V+ = +15V, GND = PGND = 0V, SYNC = REF REF = 0A, T PARAMETER 3.3V and 5V STEP-DOWN CONTROLLERS Input Supply Range 0 ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP INPUT 4.5V TO 30V V+ VL SHDN MAX1653 DH MAX1655 BST SS LX REF DL PGND SYNC CSH GND CSL SKIP FB INPUT 6V TO 30V V+ SECFB SHDN FB VL MAX1652 ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP INPUT 6V TO 30V V+ SHDN MAX1654 SS REF GND SYNC __________________________________________Typical Operating Characteristics (Circuit of Figure 1, SKIP = GND +25°C, unless otherwise noted.) A EFFICIENCY vs. LOAD CURRENT ...
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Operating Characteristics (continued) (Circuit of Figure 1, SKIP = GND +25°C, unless otherwise noted.) A EFFICIENCY vs. LOAD CURRENT (3.3V/5A CIRCUIT) 100 28V 12V MAX1653 f ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP (Circuit of Figure 1, SKIP = GND +25°C, unless otherwise noted.) A PULSE-WIDTH-MODULATION MODE WAVEFORMS OUTPUT VOLTAGE LX VOLTAGE TIME ( 6V, 3.3V/3A CIRCUIT IN DROPOUT WAVEFORMS ...
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... Switching Node (inductor) Connection. Can swing 2V below ground without hazard. High-Side Gate-Drive Output. Normally drives the main buck switch floating driver output that swings 16 DH from LX to BST, riding on the LX switching-node voltage. Dual Mode is a trademark of Maxim Integrated Products. _______________________________________________________________________________________ High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP FUNCTION = 100µ ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP Standard Application Circuits It’s easy to adapt the basic MAX1653 single-output 3.3V buck converter (Figure 1) to meet a wide range of appli- cations with inputs up to 30V (limited by choice ...
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Table 1. Component Selection for Standard Applications COMPONENT 3. Input Range 4.75V to 28V Frequency 300kHz Q1 High-Side International Rectifier MOSFET 1/2 IRF7101 Q2 Low-Side International Rectifier MOSFET 1/2 IRF7101 10µF, 35V C1 Input AVX Capacitor TPSD106M035R0300 C2 ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP The MAX1652–MAX1655 contain nine major circuit blocks, which are shown in Figure 2: PWM Controller Blocks: Multi-Input PWM Comparator Current-Sense Circuit PWM Logic Block Dual-Mode Internal Feedback Mux Gate-Driver Outputs Secondary Feedback ...
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BATTERY VOLTAGE 4.5V SECFB +2.50V REF COMPARATOR +2.50V AT 100 A REF GND ON/OFF SHDN SS MAX1652 MAX1653 MAX1654 MAX1655 Figure 2. MAX1652–MAX1655 Functional Diagram ______________________________________________________________________________________ High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP TO V+ CSL +5V LINEAR OUT ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP 2.5V (1V, MAX1655) SLOPE COMP IDLE MODE COMPARATOR SKIP 25mV (MAX1653/ MAX1655 ONLY SHDN -100mV REF (MAX1652) COMPARATOR GND (MAX1654) SECFB (NOTE 1) NOTE 1: COMPARATOR INPUT POLARITIES ...
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FB I1 REF CSH CSL SLOPE COMPENSATION Figure 4. Main PWM Comparator Block Diagram In discontinuous (light-load) mode, the synchronous switch is turned off as the inductor current falls through zero. The synchronous rectifier works under all operat- ing conditions, ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP BATTERY +5V VL SUPPLY VL MAX1652 MAX1653 MAX1654 VL BST MAX1655 DH LEVEL TRANSLATOR LX PWM VL DL Figure 5. Boost Supply for Gate Drivers an action that “boosts” the 5V gate-drive ...
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Table 3. Operating-Mode Truth Table LOAD MODE SHDN SKIP CURRENT NAME Low X X Shutdown Low, High Low Idle <10% Medium, High Low Idle <30% High, High Low PWM >30% Low Noise* High High X (PWM) * MAX1652/MAX1654 have no ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP With high input voltages, the required duty factor is approximately ( where V OUT Q2 IN age drop across the synchronous rectifier. The MAX1652’s minimum duty factor ...
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SECFB one-shot might be triggered unintentionally, causing an unnecessary increase in supply current and output noise. In ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP __________________Design Procedure The predesigned standard application circuits (Figure 1 and Table 1) contain ready-to-use solutions for com- mon applications. Use the following design procedure to optimize the basic schematic for different voltage ...
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Input Capacitor Value Place a small ceramic capacitor (0.1µF) between V+ and GND, close to the device. Also, connect a low-ESR bulk capacitor directly to the drain of the high-side MOSFET. Select the bulk input filter capacitor according to input ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP Power from the main and secondary outputs is lumped together to obtain an equivalent current referred to the main output voltage (see Inductor Value section for def- initions of parameters). Set the ...
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Boost-Supply Diode D2 A 10mA to 100mA Schottky diode or signal diode such as a 1N4148 works well for D2 in most applications. If the input voltage can go below 6V, use a Schottky diode for slightly improved efficiency and ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP __________Applications Information Heavy-Load Efficiency Considerations The major efficiency loss mechanisms under loads (in the usual order of importance) are P(I R losses P(gate), gate-charge losses P(diode), diode-conduction losses ...
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The resulting top-layer “sub-ground-plane” is connected to the normal inner-layer ground plane at the output ground terminals. This ensures that the analog GND of the IC is sensing at the ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP ___________________Chip Information TRANSISTOR COUNT: 1990 ________________________________________________________Package Information 26 ______________________________________________________________________________________ ...
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Information (continued) ______________________________________________________________________________________ High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP 27 ...
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High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP 28 ______________________________________________________________________________________ NOTES ...