BD91361MUV-E2 ROHM

Datasheet 2.7V to 5.5V, 4A 1ch Synchronous Buck Converter with Integrated FET BD91361MUV General Description Key Specifications BD91361MUV is ROHMs high efficiency step-down Input Voltage Range: 2.7V to 5.5V switching regulator designed to provide a voltage as Output Voltage Range: 0.8V to 3.3V low as 0.8V from a supply voltage of 5.5V/3.3V. It Output Current: 4.0A (Max) offers high efficiency by using pulse skip control Switching Frequency: 1MHz(Typ) technology and synchronous switches, and provides High side FET ON-Resistance: 60m(Typ) fast transient response to sudden load changes by Low side FET ON-Resistance: 55m(Typ) implementing current mode control. Standby Current: 0A (Typ) Operating Temperature Range: -40C to +105C Features Fast Transient Response because of Current Mode Package W(Typ) x D(Typ) x H(Max) PWM Control System High Efficiency for All Load Ranges because of Synchronous Rectifier (Nch/Nch FET) TM and SLLM (Simple Light Load Mode) Soft-Start Function Thermal Shutdown and UVLO Functions Short-Circuit Protection with Time Delay Function Shutdown Function Applications Power Supply for LSI including DSP, Microcomputer VQFN020V4040 and ASIC 4.00mm x 4.00mm x 1.00mm Typical Application Circuit R C f f CIN VCC PVCC VCC EN C BST ADJ ITH L SW VOUT VID<1> VID<0> R ITH R 2 CITH C O V CC R1 Figure 1. Typical Application Circuit Product structure Silicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0J3J0AJ00200-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/23 TSZ22111 14 001 06.Oct.2014 Rev.002 GND ADJ ITH SW VID<1> VID<0> Datasheet BD91361MUV Pin Configuration (TOP VIEW) 15 14 13 12 11 N.C. 16 10 VCC 17 9 EN BST 8 18 PGND 19 7 PVCC 20 6 1 2 3 4 5 Figure 2. Pin Configuration Pin Description Pin Pin Pin Pin Function Function No. Name No. Name 1 SW Power switch node 11 GND Ground pin 2 SW Power switch node 12 ADJ Output voltage detection pin GmAmp output pin/connected to 3 SW Power switch node 13 ITH phase compensation capacitor 4 SW Power switch node 14 VID<1> Output voltage control pin<1> 5 SW Power switch node 15 VID<0> Output voltage control pin<0> 6 PVCC Power switch supply pin 16 N.C. No connection 7 PVCC Power switch supply pin 17 EN Enable pin (active high) 8 PVCC Power switch supply pin 18 PGND Power switch ground pin 9 BST Bootstrapped voltage input pin 19 PGND Power switch ground pin 10 VCC Power supply input pin 20 PGND Power switch ground pin Block Diagram VCC EN VVCCCC VREF BST Current Comp Current PVCC Input VID<0> PVCC Sense/ SELECTOR R Q Protect + VID<1> S SW Output + SLOPE CLK Gm Amp OSC Driver PVCC + VCC Logic UVLO PGND Soft Start TSD GND SCP ITH ADJ R R22 RRITH CC ITH ITHITH R R11 Figure 3. Block Diagram www.rohm.com TSZ02201-0J3J0AJ00200-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/23 TSZ22111 15 001 06.Oct.2014 Rev.002