MAX1531ETJ+ Maxim Integrated Products, MAX1531ETJ+ Datasheet
MAX1531ETJ+
Specifications of MAX1531ETJ+
Related parts for MAX1531ETJ+
MAX1531ETJ+ Summary of contents
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... TEMP RANGE MAX1530ETJ+ -40°C to +85°C MAX1530ETJ+T -40°C to +85°C MAX1531ETJ+ -40°C to +85°C MAX1531ETJ+T -40°C to +85° Exposed pad. + Denotes a lead(Pb)-free/RoHS-compliant package. T indicates tape and reel. Pin Configuration appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’ ...
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Multiple-Output Power-Supply Controllers for LCD Monitors ABSOLUTE MAXIMUM RATINGS IN, DRV1, DRV2, DRV3, DRV4, CSH, CSL to AGND .....................................................-0.3V to +30V DRV5 to VL .............................................................-28V to +0.3V CSH to CSL ..............................................................-0. AGND ..............................................................-0.3V to +6V PGND ...
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... ILIM Inp ut D ual M od e™ Thr eshol d OSCILLATOR FREQ = AGND Switching Frequency FREQ = VL FREQ = AGND Maximum Duty Cycle FREQ = VL Dual Mode is a trademark of Maxim Integrated Products, Inc. _______________________________________________________________________________________ = 5V 0°C to +85°C, unless otherwise noted. Typical values are CONDITIONS - V ) CSL ...
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Multiple-Output Power-Supply Controllers for LCD Monitors ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 12V SEQ PARAMETER SOFT-START Step Size Measured at FB FREQ = GND Period FREQ = VL FET DRIVERS DH, DL ...
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Multiple-Output Power-Supply Controllers for ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 12V SEQ PARAMETER FREQ = GND Soft-Start Period FREQ = VL POSITIVE LINEAR REGULATOR (LR4) FBL4 Regulation Voltage V DRV4 FBL4 Input ...
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Multiple-Output Power-Supply Controllers for LCD Monitors ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 12V SEQ PARAMETER CONTROL AND SEQUENCE ONL_ Input Threshold ONL_ rising, 25mV hysteresis EN Input Threshold EN rising, 5% hysteresis ...
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Figure 1; including R5, R6, and D2; T STEP-DOWN EFFICIENCY vs. LOAD CURRENT 100 f = 500kHz 12V 20V 300 600 900 1200 1500 LOAD ...
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Multiple-Output Power-Supply Controllers for LCD Monitors (Circuit of Figure 1; including R5, R6, and D2; T LR1 NORMALIZED LOAD REGULATION 0 -0.5 -1.0 -1.5 -2.0 0 100 200 300 400 LOAD CURRENT (mA) LR2/LR3 BASE CURRENT vs. DRV2/DRV3 VOLTAGE 5 ...
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Figure 1; including R5, R6, and D2; T LR4 NORMALIZED LOAD REGULATION 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 0 100 200 LOAD CURRENT (mA) LR4 LOAD TRANSIENT 40µs/div A: LR4 OUTPUT VOLTAGE, 100mV/div, AC-COUPLED B: LR4 LOAD ...
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Multiple-Output Power-Supply Controllers for LCD Monitors (Circuit of Figure 1; including R5, R6, and D2; T LR5 NORMALIZED LOAD REGULATION 0 -0.2 -0.4 -0.6 -0.8 -1 LOAD CURRENT (mA) PIN NAME MAX1530 MAX1531 1 1 DRV2 2 ...
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Multiple-Output Power-Supply Controllers for PIN NAME MAX1530 MAX1531 12 12 RESET 13 13 COMP ILIM 16 16 ONL2 17 17 ONL3 20 20 PGND ______________________________________________________________________________________ FUNCTION Open-Drain Reset Output. ...
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Multiple-Output Power-Supply Controllers for LCD Monitors PIN NAME MAX1530 MAX1531 BST 25 25 SEQ 26 26 FREQ AGND FBL1 32 32 DRV1 ...
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Multiple-Output Power-Supply Controllers for PIN NAME MAX1530 MAX1531 — 7 FBL4 — 8 DRV4 — 9 FBL5 — 10 DRV5 — 18 ONL4 — 19 ONL5 — — EP ______________________________________________________________________________________ FUNCTION Source Drive Linear Regulator (LR4) Feedback Input. FBL4 regulates ...
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Multiple-Output Power-Supply Controllers for LCD Monitors V = 12V IN C3 4.7μF R3 25V 124kΩ 20.0kΩ 5V/30mA C4 1μF R7 100kΩ R14 121kΩ 1% R15 68.1kΩ 1% R16 43.2kΩ 1% C11 0.1μF R17 V IN ...
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Multiple-Output Power-Supply Controllers for V = 12V IN C3 4.7μF R3 25V 124kΩ 20.0kΩ 5V/30mA 28 C4 1μ 100kΩ R14 121kΩ C11 0.1μ ...
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Multiple-Output Power-Supply Controllers for LCD Monitors Table 1. Selected Component List DESIGNATION DESCRIPTION 4.7µF, 25V X7R ceramic capacitor (1210) C3 TDK C3225X7R1E475K 22µF, 6.3V X7R ceramic capacitor C7 TDK C3216X7R0J226M 10µF, 6.3V X5R ceramic capacitor C9 TDK C2012X5R0J106M 0.47µF, 16V ...
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Multiple-Output Power-Supply Controllers for FREQ EN RSTIN RESET GND COMP FB ILIM ONL2 ONL3 ONL4 ONL5 SEQ DRV1 V SOFT- REF START FBL1 LR1 0.9VREF CSH 300mV CSL DRV2 V SOFT- REF START FBL2 LR2 0.9VREF Figure 3. IC Functional ...
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Multiple-Output Power-Supply Controllers for LCD Monitors ∑ SLOPE SS DONE DC-DC EN SOFT- V REF START GM FB PWM COMP COMP CLOCK CURRENT ILIM LIMIT FAULT COMPARATOR 0.9VREF Figure 4. Step-Down Controller Block Diagram pumps attached to the switching node ...
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Multiple-Output Power-Supply Controllers for The ILIM pin is a dual-mode input. When ILIM is con- nected to VL, a default low-side current limit of 250mV (typ) is used. If ILIM is connected to a voltage between 250mV and 3V, the ...
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Multiple-Output Power-Supply Controllers for LCD Monitors LR2 is typically used to generate the TFT LCD gamma reference voltage, which is usually 0.3V below the source drive supply voltage. LR2 is enabled when the step-down regulator is enabled and the voltage ...
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Multiple-Output Power-Supply Controllers for loads. For example, when switched at 500kHz, large MOSFETs with a total of 40nC total gate charge would require 40nC × 500kHz, which is approximately 20mA. On/Off Control (EN) The EN pin has an accurate 1.238V ...
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Multiple-Output Power-Supply Controllers for LCD Monitors total delay. Because of the 6µA current flowing through R1 (51kΩ), the voltage on ONLc is 0.31V greater than the voltage on ONLd and it crosses the 1.238V thresh- old and enables its LR_ ...
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Multiple-Output Power-Supply Controllers for load current ratio (LIR = 0.3), which corresponds to a peak inductor current 1.15 times the DC load current: × − OUT IN OUT = L × × ...
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Multiple-Output Power-Supply Controllers for LCD Monitors VL and AGND at ILIM. The threshold is approximately 1/5th the voltage on ILIM over a range of 0.25V to 3V: × < × VALLEY DS ON HOT ( ...
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Multiple-Output Power-Supply Controllers for amplifier g , the compensation resistor R m regulation V , and the output voltage set point V FB ⎛ × A VCS × V ⎜ OUT + Δ ⎝ SC UNDER = V UNDER AC ...
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Multiple-Output Power-Supply Controllers for LCD Monitors Current-mode control has the effect of splitting the complex pole pair of the output LC filter into a single low-frequency pole and a single high-frequency pole. The low-frequency current-mode pole depends on out- put ...
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Multiple-Output Power-Supply Controllers for crossover frequency as a function the MOSFET R and the output capacitance: DS(ON) × CROSSOVER × × 2π VCS OUT SET ( Change one or both of these ...
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Multiple-Output Power-Supply Controllers for LCD Monitors Because R11 is less than 100kΩ, use 100kΩ for R11 and recalculate C10 as (step 3): 1 ≈ π × × kHz 100 Use the standard value of ...
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Multiple-Output Power-Supply Controllers for Increasing the flying capacitor value lowers the effec- tive source impedance and increases the output cur- rent capability. Increasing the capacitance indefinitely has a negligible effect on output current capability because the internal switch resistance and ...
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Multiple-Output Power-Supply Controllers for LCD Monitors amount of ripple after the PC board layout has been optimized, consider increasing output capacitance. Adding more capacitance does not eliminate the ripple, but proportionally reduces the amplitude of the ripple. If increasing the ...
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Multiple-Output Power-Supply Controllers for 4) Next, calculate the pole set by each linear regula- tor’s feedback resistance and the capacitance (C ) between FBL_ and AGND (approximately FBL_ 5pF including stray capacitance POLE FBL ( 1 ) ...
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Multiple-Output Power-Supply Controllers for LCD Monitors Pin Configuration TOP VIEW + DRV2 1 FBL2 2 FBL3 3 DRV3 4 MAX1530 CSH* 5 MAX1531 CSL* 6 FBL4* 7 DRV4 N.C. FOR MAX1530 THIN QFN 32 ______________________________________________________________________________________ PROCESS: BiCMOS ...
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... 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 ____________________ 33 © 2010 Maxim Integrated Products ...