max5066auit Maxim Integrated Products, Inc., max5066auit Datasheet
![no-image](/images/no-image-200.jpg)
max5066auit
Related parts for max5066auit
max5066auit Summary of contents
Page 1
Rev 1; 8/05 Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications General Description The MAX5066 is a two-phase, configurable single- or dual-output buck controller with an input voltage range of 4.75V to 5.5V or from 5V to 28V. Each ...
Page 2
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications ABSOLUTE MAXIMUM RATINGS IN to AGND.............................................................-0.3V to +30V BST_ to AGND........................................................-0.3V to +35V DH_ to LX_ ....................................-0. DL_ to PGND ..............................................-0. BST_ to LX_ ..............................................................-0.3V to +6V V ...
Page 3
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications ELECTRICAL CHARACTERISTICS (continued +5V REG DD EN_ A (Note 1) PARAMETER SYMBOL OSCILLATOR Switching Frequency Switching Frequency Accuracy RT/CLKIN Output ...
Page 4
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications ELECTRICAL CHARACTERISTICS (continued +5V REG DD EN_ A (Note 1) PARAMETER SYMBOL CURRENT-ERROR AMPLIFIER (CEA_) Transconductance Open-Loop Gain A VOL(CEA) ...
Page 5
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications (Circuit of Figure +25°C, unless otherwise noted OSCILLATOR FREQUENCY vs 10,000 1000 100 10 0 100 200 300 ...
Page 6
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications (Circuit of Figure +25°C, unless otherwise noted REF LINE REGULATION 3.303 3.302 REF 3.301 3.300 3.299 3.298 I = 200µA REF 3.297 3.296 5 ...
Page 7
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications (Circuit of Figure +25°C, unless otherwise noted LOW-SIDE DRIVER FALL TIME (V = 12V LOAD 20ns/div TURN-ON/-OFF WAVEFORMS ( 10A) OUT1 OUT2 ...
Page 8
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications PIN NAME Current-Sense Differential Amplifier Negative Input for Output2. Connect CSN2 to the negative 1 CSN2 terminal of the sense resistor. The differential voltage between CSP2 and CSN2 is internally amplified by ...
Page 9
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications PIN NAME Current-Sense Differential Amplifier Negative Input for Output1. Connect CSN1 to the negative 14 CSN1 terminal of the sense resistor. The differential voltage between CSP1 and CSN1 is internally amplified by ...
Page 10
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications CLP1 10 EAOUT1 12 EAN1 11 UVLO REG FOR INTERNAL 21 REG BIASING EN1 15 REF 3.3V UV33 REF V = 0.61V INTREF EN2 ...
Page 11
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications Finally, a thermal-shutdown feature protects the device during thermal faults and shuts down the MAX5066 when the die temperature exceeds +160°C. Dual-Output/Dual-Phase Select (MODE) The MAX5066 can operate as a dual-output indepen- ...
Page 12
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications Hiccup Fault Protection The MAX5066 includes overload fault protection circuit- ry that prevents damage to the power MOSFETs. The fault protection consists of two digital fault integration blocks that enable “hiccuping” under ...
Page 13
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications oscillator. The PWM on-cycle terminates when the ramp voltage exceeds the error voltage from the current-error amplifier (CEA1). The outer voltage control loop consists of the voltage- error amplifier (VEA1). The noninverting ...
Page 14
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications 52.5mV CLP_ CSP_ g M CSN_ GM IN RAMP (V/S) SW CLK 1.225V EN_ Figure 3. Current Comparator and MOSFET Driver Logic V OUT R ...
Page 15
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications D1 (100mA, 30V) C2 1µF C8 0.1µ 0.5µH 2mΩ 0.8V/10A D3 C6 (1A, 30V) 680µF R4 1.74kΩ R5 4.64kΩ R16 REG REF 100kΩ R17 100kΩ EXTERNAL FREQUENCY ...
Page 16
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications D1 (100mA, 30V) C2 1µF C8 0.1µ 0.8µH 2mΩ 1.3V/20A D3 C6 (1A, 30V) 680µF R4 5.11kΩ R5 4.75kΩ R16 REG REF 100kΩ R17 100kΩ EXTERNAL FREQUENCY ...
Page 17
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications prevent shoot-through currents during transition. shows the dual-phase, single-output buck regulator. Design Procedures Inductor Selection The switching frequency per phase, peak-to-peak ripple current in each phase, and allowable voltage ripple at the ...
Page 18
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications Table 1. High-Side MOSFET Losses LOSS DESCRIPTION Losses associated with MOSFET on-time and Conduction Loss on-resistance. I RMS and duty cycle. Losses associated with charging and discharging the gate capacitance of the ...
Page 19
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications Table 2. Low-Side MOSFET Losses LOSS DESCRIPTION Losses associated with MOSFET on-time, I Conduction Loss is a function of load current and duty cycle. Losses associated with charging and discharging the gate ...
Page 20
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications × REVERSE R SENSE Output-Voltage Setting The output voltage is set by the combination of resistors R1, R2, and R as described in the Voltage Error Amplifier ...
Page 21
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications Calculate C such that: CFF CFF × × π × C where C is C11 and C13 in Figure 6. CFF Applications Information Independant Turn-On and ...
Page 22
... Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products © 2005 Maxim Integrated Products Printed USA Printed USA is a registered trademark of Maxim Integrated Products, Inc registered trademark of Maxim Integrated Products, Inc. Package Information PACKAGE OUTLINE, TSSOP, 4.40 MM BODY, EXPOSED PAD 1 E ...