Rev 1.6 DIO7552/7553 Precision Adjustable Current-Limited Power Distribution Switches Features Descriptions 70m(typ) High-Side MOSFET The DIO7552/7553 is power distribution switches 2.31A Maximum Continuous Load Current that intended for applications where precision 10% Current-Limit Accuracy at 1A typically current limiting is required or heavy capacitive Adjustable Current Limit: 400mA2.57A (typ) loads and short circuits are encountered and Operating Range: 2.7V to 5.5V provide up to 2.31A of continuous load current. 70A(typ) Quiescent Current When the voltage is higher than the maximum 2s Fast Over current Response Typically voltage of 5%, the chip could be maintained for at Reverse Input-Output Voltage Protection least 10ms without damage. 6kV HBM ESD Protection A programmable current-limit threshold is offered Green package: SOT23-6 and DFN2*2-6 is pin between 400mA and 2.57A (typ) via an external compatible resistor. Current-limit accuracy is 10% 1A. The power-switch rise and fall times are controlled to Application minimize current surges during turn on/off. A constant-current mode is used when the output USB Ports & USB Hubs load exceeds the current-limit threshold. Digital TV Set-Top Boxes The DIO7552/7553 limits the output current to a VOIP Phones safe level by using a constant-current mode when Short-Circuit Protections the output load exceeds the current-limit threshold. An internal reverse voltage comparator disables the power switch when the output voltage is driven higher than the input to protect devices on the input side. Block Diagram Figure 1 Functional Block Diagram www.dioo.com 2018 DIOO MICROCIRCUITS CO., LTD DIO7552/7553 Rev. 1.6 Precision Adjustable Current-Limited Power Distribution Switches DIO7552/7553 Ordering Information Order Part Number Top Marking Green T Package A DIO7552ST6 YW52 Yes -40 to 85C SOT23-6 Tape & Reel, 3000 DIO7553ST6 YW53 Yes -40 to 85C SOT23-6 Tape & Reel, 3000 DIO7552CD6 D52 Yes -40 to 85C DFN2*2-6 T Tape & Reel, 3000 DFN2*2-6 T DIO7553CD6 D53 Yes -40 to 85C Tape & Reel, 3000 Pin Assignment OUT 1 6 IN 1 6 IN OUT ILIM PAD 2 5 GND 2 5 GND ILIM 3 4 3 4 FAULT EN/EN FAULT EN/EN DFN-6 SOT23-6 EN = Active Low for the DIO7552, EN = Active High for the DIO7553 Figure 2 Pin Assignment Pin Description Name Function Input voltage connect a 0.1F or greater ceramic capacitor from IN to GND as close to the IN IC as possible. GND Ground pin. EN Enable input, logic high turns on power switch. EN Enable input, logic low turns on power switch. Active-low open-drain output, asserted during over current, over temperature, or FAULT reverse-voltage conditions. ILIM External resistor used to set current-limit threshold recommended 10k R 64k. ILIM OUT Power-switch output. www.dioo.com 2018 DIOO MICROCIRCUITS CO., LTD DIO7552/7553 Rev. 1.6