Evaluates: MAX1530/MAX1531 19-3520 Rev 0 11/04 MAX1531 Evaluation Kit General Description Features The MAX1531 evaluation kit (EV kit) is a fully assembled Output Voltages (Input Range = +10.5V to +24V or and tested surface-mount circuit board that provides +9.5V to +24V Using Included MAX1522 Circuit) logic and bias power required for liquid crystal display +3.3V Output at 1.5A (Step-Down Switching (LCD) monitors. The EV kit contains a step-down Regulator) switching regulator, a logic-supply linear regulator, a +2.5V Output at 500mA (Logic-Supply source-driver-supply linear regulator, a gamma-refer- Regulator) ence linear regulator, a two-stage positive charge +10V Output at 500mA (Source-Driver Supply pump and linear regulator for the TFT gate-on supply, Regulator) and a one-stage negative charge pump and linear reg- +9.7V Output at 50mA (Gamma-Reference ulator for the TFT gate-off supply. The source-driver Regulator) supply, the gamma-reference supply, the gate-on sup- +25V Output at 25mA (Positive Charge Pump ply, and the gate-off supply can be sequenced in any and Linear Regulator) power-up order. The EV kit also includes a MAX1522 -9V Output at 50mA (Negative Charge Pump step-up switching regulator to provide a higher output and Linear Regulator) voltage option for the source-driver supply and the gamma reference. +8V to +24V Input Range (Reduced Output Voltages) The EV kit produces the output voltages listed in the features column using a +10.5V to +24V input voltage Resistor-Adjustable Outputs range. The input range can be reduced to +9.5V if the 92% Efficiency (Step-Down Switching Regulator) included MAX1522 step-up regulator circuit is used. If 250kHz/500kHz Selectable Step-Down Switching lower output voltages are acceptable, the input range Frequency can be further reduced to +8V. The EV kit features undervoltage protection for the Programmable Power-Up Sequencing input, overcurrent protection for the step-down switch- Soft-Start for All Outputs ing regulator, and overload protection for the source- Multilevel Protection drive linear regulator. Operation at 500kHz allows the Resistor-Adjustable Input Undervoltage use of small surface-mount components. The EV kit Threshold also evaluates the MAX1530. Output Undervoltage Shutdown Overcurrent Protection for One Linear Regulator Current Limit for the Step-Down Switching Regulator Component List External Step-Up Switching Regulator (MAX1522) DESIGNATION QTY DESCRIPTION Included Also Evaluates the MAX1530 (IC Replacement 1F 10%, 25V X7R ceramic Required) C1, C4 2 capacitors (0805) TDK C2012X7R1E105K Low-Profile, Surface-Mount Components C2, C23 0 Not installed capacitors (0603) Fully Assembled and Tested 4.7F 10%, 25V X7R ceramic C3 1 capacitor (1210) TDK C3225X7R1E475K Ordering Information C5, C6, C8, 0.1F 10%, 50V X7R ceramic PART TEMP RANGE IC PACKAGE C11, C14, C15, 9 capacitors (0603) MAX1531EVKIT 0C to +70C 32 TQFN (5mm x 5mm) C17, C18, C20 TDK C1608X7R1H104K 22F 20%, 6.3V X7R ceramic C7 1 capacitor (1206) TDK C3216X7R0J226M Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX1531 Evaluation Kit Component List (continued) DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 10F 20%, 6.3V X5R ceramic 10H, 2.3A inductor DC L1 1 C9 1 capacitor (1206) Sumida CDR7D28MN-100 TDK C3216X5R0J106M 22H, 0.90A inductor DC L2 1 Sumida CDRH5D28-220 470pF 10%, 50V X7R ceramic capacitor (0603) C10 1 2.5A, 30V dual n-channel MOSFET TDK C1608X7R1H471K N1 1 (Super SOT-6) Fairchild Semiconductor FDC6561AN 0.47F 10%, 16V X7R ceramic C12, C19 2 capacitors (0805) 5.2A, 30V n-channel MOSFET (Super TDK C2012X7R1C474K N2 1 SOT-6) Fairchild Semiconductor FDC633N 4.7F 10%, 16V X7R ceramic C13, C25 2 capacitors (1206) 3A, 60V low-saturation pnp bipolar TDK C3216X7R1C475K transistors Q1, Q4 2 (SOT-223) 0.47F 20%, 50V X7R ceramic Fairchild Semiconductor NZT660A C16 1 capacitor (1210) TDK C3225X7R1H474M 200mA, 40V pnp bipolar transistors Q2, Q3 2 (SOT23) 2.2F 10%, 25V X7R ceramic Central Semiconductor CMPT3906 C21, C22 2 capacitors (1206) TDK C3216X7R1E225K 200mA, 40V npn bipolar transistors Q5, Q6 2 (SOT23) 10F 20%, 25V X5R ceramic Central Semiconductor CMPT3904 capacitor (1210) C24 1 TDK C3225X5R1E106M R1 1 17.8k 1% resistor (0805) R2, R23 2 10.7k 1% resistors (0805) 1F 10%, 10V X5R ceramic C26 1 capacitor (0603) R3 1 124k 1% resistor (0805) TDK C1608X5R1A105K R4 1 20.0k 1% resistor (0805) R5, R6, R7, 100mA, 30V Schottky diodes (SOD- 4 100k 5% resistors (0805) R11 D1, D6 2 523) Central Semiconductor CMOSH-3 R8, R17, R24, 4 6.8k 5% resistors (0805) R27 1A, 30V Schottky diode (S-flat) D2 1 Toshiba CRS02 R9, R10, R19, 4 10.0k 1% resistors (0805) R32 250mA, 100V dual diodes (SOT23) D3, D4, D5 3 Central Semiconductor CMPD6001S R12 1 301k 1% resistor (0805) R13 1 221k 1% resistor (0805) 250mA, 75V high-speed silicon diode R14 1 121k 1% resistor (0805) D7 1 (SOD-523) Central Semiconductor CMOD4448 R15, R18 2 68.1k 1% resistors (0805) R16 1 43.2k 1% resistor (0805) JU1, 6 3-pin headers JU12JU16 R21 1 1.5k 5% resistor (0805) JU2, JU3 2 2-pin headers R22 1 75.0k 1% resistor (0805) JU4JU7 4 3-way jumpers (4 pins) R25 1 200k 1% resistor (0805) JU8JU11 4 4-way jumpers (5 pins) R26 1 10.5k 1% resistor (0805) 2 Evaluates: MAX1530/MAX1531