Document
PAM2320
3A LOW NOISE STEP-DOWN DC-DC CONVERTER
Description
Pin Assignments
The PAM2320 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 PAM2320 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 PAM2320 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 1µA. Other key features include over-temperature and short circuit protection, and under-voltage lockout to prevent deep battery discharge.
The PAM2320 delivers 3A maximum output current while consuming only 42µA of no-load quiescent current. Ultra-low RDS(ON) integrated MOSFETs and 100% duty cycle operation make the PAM2320 an ideal choice for high output voltage, high current applications which require a low dropout threshold.
The PAM2320 is available in PSOP-8 package.
Features
Output Current: Up to 3A Output Voltage: 0.6V to VIN Input Voltage: 2.7V to 5.5V Efficiency Up to 95% 42µA (Typ) No Load Quiescent Current Shutdown Current: <1µA 100% Duty Cycle Operation 1.5MHz Switching Frequency Internal Soft Start No External Compensation Required Current Limit Protection Thermal Shutdown PSOP-8 Package Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) For automotive applications requiring specific change
control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/
Applications
5V or 3.3V Point of Load Conversion Telecom/Networking Equipment Set Top Boxes Storage Equipment Video Cards DDR Power Supply
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
PAM2320
Document number: DS36405 Rev. 4 - 2
1 of 13 www.diodes.com
June 2021
© Diodes Incorporated
Typical Applications Circuit
PAM2320
VO
0.6
1
R1
R
2
Pin Descriptions
Pin Number
1 2 3 4 5 6
7
8
PSOP-8 Pin Name
NC VIN SW GND FB NC
EN
NC
Function
Not Connected. Bias supply. Chip main power supply pin. The drains of the internal main and synchronous power MOSFET. Ground Feedback voltage to internal error amplifier, the threshold voltage is 0.6V. Not Connected. Enable control input. Force this pin voltage above 1.5V, enables the chip, and below 0.3V shuts down the device. Not Connected.
Functional Block Diagram
PAM2320
Document number: DS36405 Rev. 4 - 2
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June 2021
© Diodes Incorporated
PAM2320
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.)
These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. All voltages are with respect to ground.
Parameter Input Voltage VIN SW Pin Voltage FB Pin Voltage EN Pin Voltage Maximum Junction Temperature Storage Temperature Range Soldering Temperature
Rating 6
-0.3 to (VIN +0.3) -0.3 to (VIN +0.3)
-0.3 to +6.0 +150
-65 to +150 +300, 5sec
Unit V V V V °C °C °C
Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Supply Voltage Junction Temperature Range Ambient Temperature Range
Parameter
Rating
Unit
2.7 to 5.5
V
-40 to +125 °C
-40 to +85
Thermal Information
Parameter Thermal Resistance (Junction to Ambient) Thermal Resistance (Junction to Case) Internal Power Dissipation (@TA= +25°C)
Symbol θJA θJC PD
Package PSOP-8 PSOP-8 PSOP-8
Max 90 14 1100
Unit °C/W mW
PAM2320
Document number: DS36405 Rev. 4 - 2
3 of 13 www.diodes.com
June 2021
© Diodes Incorporated
PAM2320
Electrical Characteristics (@TA = +25°C, VIN = 3.6V, VO = 1.8V, CIN = 22µF, CO = 22µF, L = 2.2µH, unless otherwise specified.)
Parameter Input Voltage Range Output Voltage Range
UVLO Threshold
Regulated Output Voltage Accuracy Regulated Feedback Voltage FB Leakage Current Output Voltage Line Regulation Output Voltage Load Regulation Quiescent Current Shutdown Current Current Limit Oscillator Frequency
Drain-Source On-State Resistance
High Ef.