MAX8710EVKIT Maxim Integrated Products, MAX8710EVKIT Datasheet
MAX8710EVKIT
Specifications of MAX8710EVKIT
Related parts for MAX8710EVKIT
MAX8710EVKIT Summary of contents
Page 1
... THIN QFN 4mm x 4mm Pin Configurations continued at end of data sheet. Dual Mode is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Low-Cost, Linear-Regulator LCD Panel Power Supplies ♦ ...
Page 2
Low-Cost, Linear-Regulator LCD Panel Power Supplies ABSOLUTE MAXIMUM RATINGS CTL, FBL, FBP, FBN, SHDN, REF, THR to GND........-0.3V to +6V MODE, DLP to GND ......................................-0. IN, INL to GND .........................................................-0.3V to +28V SUPCP, SUPB to GND.............................................-0.3V to +14V ...
Page 3
ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure INL SUPCP +25°C, unless otherwise noted.) PARAMETER OPERATIONAL AMPLIFIER (MAX8710/MAX8711/MAX8761) SUPB Supply Operating Range SUPB Supply Current Input Offset Voltage Input Bias Current Common-Mode Input Range Common-Mode ...
Page 4
Low-Cost, Linear-Regulator LCD Panel Power Supplies ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure INL SUPCP +25°C, unless otherwise noted.) PARAMETER V DRVN n-Channel On-Resistance V FBN Fault Trip Level Rising edge Negative Charge-Pump Soft-Start ...
Page 5
ELECTRICAL CHARACTERISTICS (Circuit of Figure INL SUPCP MAX8761), unless otherwise noted.) (Note 1) PARAMETER REF Output Voltage SUPCP Input Supply Range Charge-Pump Regulators Operating Frequency LINEAR REGULATOR Dropout Voltage FBL Regulation Voltage FBL ...
Page 6
Low-Cost, Linear-Regulator LCD Panel Power Supplies ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure INL SUPCP MAX8761), unless otherwise noted.) (Note 1) PARAMETER DRVN n-Channel On-Resistance SEQUENCE CONTROL SHDN Input Low Voltage SHDN Input High ...
Page 7
Figure INL SUPCP +25°C, unless otherwise noted.) MAX8761 LINEAR-REGULATOR LOAD REGULATION 0 10V OUTL V = 12V -0.4 INL -0.8 -1.2 -1.6 LOAD CURRENT (mA) -2.0 0 100 ...
Page 8
Low-Cost, Linear-Regulator LCD Panel Power Supplies (Circuit of Figure INL SUPCP +25°C, unless otherwise noted.) POSITIVE CHARGE-PUMP LINE REGULATION 0.2 0 -0.2 -0.4 -0.6 -0.8 20mA LOAD CURRENT -1 ...
Page 9
Figure INL SUPCP +25°C, unless otherwise noted.) REFERENCE vs. TEMPERATURE 0.2 0 -0.2 -0.4 -0.6 -40 - 100 TEMPERATURE (°C) MAX8710/MAX8711/MAX8761 OPERATIONAL- AMPLIFIER LARGE-SIGNAL STEP RESPONSE ...
Page 10
Low-Cost, Linear-Regulator LCD Panel Power Supplies PIN MAX8710/ MAX8711 MAX8712 MAX8761 1 — — 2 — — — — — — ...
Page 11
PIN MAX8710/ MAX8711 MAX8712 MAX8761 — — — — — — Typical Operating Circuit Figures 1, 2, and 3 are the Typical Operating Circuits of ...
Page 12
Low-Cost, Linear-Regulator LCD Panel Power Supplies AV DD 0.1µF 120kΩ 100kΩ OUTB MMBD4148SE (FAIRCHILD) 0.22µF 1µF GOFF R5 -5V/50mA 110kΩ 100kΩ 1% REF 0.47µF 51.1kΩ 5V/1mA 20kΩ SHDN Figure 1. MAX8710/MAX8761 Typical Operating Circuit 12 ______________________________________________________________________________________ IN GND ...
Page 13
AV DD 0.1µF 120kΩ 100kΩ OUTB MMBD4148SE (FAIRCHILD) 1µF GOFF -5V/50mA R5 110kΩ 100kΩ 1% REF 0.47µF 5V/1mA SHDN Figure 2. MAX8711 Typical Operating Circuit ______________________________________________________________________________________ Low-Cost, Linear-Regulator LCD Panel Power Supplies GND IN 10.8V TO 13.2V 0.1µF ...
Page 14
Low-Cost, Linear-Regulator LCD Panel Power Supplies MMBD4148SE (FAIRCHILD) 1µF GOFF R5 -5V/50mA 110kΩ 100kΩ 1% REF 0.47µF 5V/1mA 0.1µF SHDN Figure 3. MAX8712 Typical Operating Circuit reference voltage, the controller lowers the base current of the pnp transistor, ...
Page 15
REF GOFF VCOM CTL Figure 4. MAX8710/MAX8761 Functional Diagram ______________________________________________________________________________________ Low-Cost, Linear-Regulator LCD Panel Power Supplies IN INL MAX8710 GND MAX8761 REF REF OUTL LINEAR REG FBL FBN SUPCP OSC SHDN DRVN DRVP ...
Page 16
Low-Cost, Linear-Regulator LCD Panel Power Supplies The linear regulator is enabled whenever REF is in regula- tion and SHDN is logic high. Each time it is enabled, the linear regulator goes through a soft-start routine by ramp- ing up its ...
Page 17
C voltage across C plus a diode drop (V OUT(POS smaller than the level-shifted flying-capacitor DIODE voltage ( charge flows from C CX(POS) INPUT to C until diode ...
Page 18
Low-Cost, Linear-Regulator LCD Panel Power Supplies Power-Up Sequence and Shutdown Control When the MAX8710/MAX8711/MAX8712/MAX8761 are powered up, REF rises with the voltage on IN. After REF reaches regulation and if SHDN is logic high, the linear regulator, operational amplifier, and ...
Page 19
REF DLP Q4 0 REF REF 50µ MODE 1kΩ CTL Figure 6. MAX8710 High-Voltage Switch Control ______________________________________________________________________________________ Low-Cost, Linear-Regulator LCD Panel Power Supplies 5µA FAULT SHDN REF OK 1kΩ Q3 MAX8710 SRC Q1 GON ...
Page 20
Low-Cost, Linear-Regulator LCD Panel Power Supplies MAX8761 REF 50µ MODE 1kΩ CTL Figure 7. MAX8761 High-Voltage Switch Control 20 ______________________________________________________________________________________ FAULT REF SRC GON DRN THR ...
Page 21
Design Procedure Linear Regulator Output-Voltage Selection Adjust the linear-regulator output voltage by connecting a resistive voltage-divider from the linear-regulator out- put AV to GND with the center tap connected to FBL DD (Figure 1). Select the lower resistor of divider ...
Page 22
Low-Cost, Linear-Regulator LCD Panel Power Supplies ƒ 1 ƒ ZERO π OUTL where R1 is the upper resistor of the feedback divider and f is the unity gain frequency. The unity gain ...
Page 23
Charge-Pump Output Capacitor Increasing the output capacitance or decreasing the ESR reduces the output ripple voltage and the peak-to- peak transient voltage. With ceramic capacitors, the output voltage ripple is dominated by the capacitance value. Use the following equation to ...
Page 24
Low-Cost, Linear-Regulator LCD Panel Power Supplies PC Board Layout Guidelines Careful PC board layout is important for proper opera- tion. Use the following guidelines for good PC board layout: 1) Create a power ground island consisting of the lin- ear-regulator ...
Page 25
... 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. 25 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products ...