PAM2307AJEADJR Diodes Incorporated

A Product Line of Diodes Incorporated PAM2307 3A LOW NOISE STEP-DOWN DC-DC CONVERTER Description Pin Assignments The PAM2307 is a 3A step-down DC-DC converter. At heavy load, the constant-frequency PWM control performs excellent stability and transient response. No external compensation components are required. The PAM2307 supports a range of input voltages from 2.7V to 5.5V, allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/ NiMH cell,and other standard power sources. The output voltage is adjustable from 0.6V to the input voltage. The PAM2307 employs internal power switch and synchronous rectifier to minimize external part count and realize high efficiency. During shutdown, the input is disconnected from the output and the shutdown current is less than 1A. Other key features include over-temperature and short circuit protection, and under-voltage lockout to prevent deep battery discharge. The PAM2307 delivers 3A maximum output current while consuming only 42A of no-load quiescent current. Ultra-low R integrated DS(ON) MOSFETs and 100% duty cycle operation make the PAM2307 an ideal choice for high output voltage, high current applications which require a low dropout threshold. The PAM2307 is available in QFN3x3 16-Pin and SOP-8(EP) package. Features Applications Output Current: Up to 3A 5V or 3.3V Point of Load Conversion Output Voltage: 0.6V to V IN Telecom/Networking Equipment Input Voltage: 2.7 to 5.5V Set Top Boxes Efficiency up to 95% Storage Equipment 42A (Typ) No Load Quiescent Current Video Cards Shutdown Current: <1A DDR Power Supply 100% Duty Cycle Operation 1.5MHz Switching Frequency Internal Soft Start No external Compensation Required Current Limit Protection Thermal Shutdown QFN3x3 16-Pin and SOP-8(EP) Package 1 of 14 September 2012 PAM2307 Diodes Incorporated www.diodes.com Document number: DSxxxxx Rev. 2 - 1 A Product Line of Diodes Incorporated PAM2307 Typical Applications Circuit R1 V O = 0.6 1 + R2 Pin Descriptions Pin Package Name Function Name QFN3x3-16L SOP-8(EP) Main power ground pin. PGND 1, 2, 3 2 FB 4 3 Feedback voltage to internal error amplifier, the threshold voltage is 0.6V. GND 5 4 Signal ground for small signal components. NC 6, 16 No connection. Enable control input. Force this pin voltage above 1.5V, enables the chip, and EN 7 5 below 0.3V shuts down the device. TEST 8 6 Test Mode(no connect or to Ground). Bias supply. Chip main power supply pin. VIN 9 7 Input supply for power stage. Must be closely decoupled to PGND. PVIN 10, 11, 12 8 SW 13, 14, 15 1 The drains of the internal main and synchronous power MOSFET. Functional Block Diagram 2 of 14 September 2012 PAM2307 Diodes Incorporated www.diodes.com Document number: DSxxxxx Rev. 2 - 1