Diodes PAM2401 User Manual
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Description
The PAM2401 is a high efficiency, current mode, fixed frequency,
step-up DC/DC converter with true output disconnect and inrush
current limiting. The device includes one 0.10Ω N-channel MOSFET
switch and one 0.15Ω P-channel synchronous rectifier. This product
has the ability to simply program the output voltage from 2.5V to
5.0V.The switching frequency is 1.0MHz, programmable current limit
set by an external resistor from 1.0A to 3.0A with internal soft-start.
When loading became light, the converter will automatically enter into
PSM to improve the efficiency.
Quiescent current is only 150µA during Pulse Skip Mode operation,
maximizing battery life in portable applications. Other features include
: <1µA shutdown, anti-ringing control, Hiccup mode at short
protection, over voltage protection and over temperature protection.
The PAM2401 is available in MSOP-8 and U-DFN3030-12 packages
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Diodes Incorporated
1.0MHz STEP-UP DC-DC CONVERTER
Pin Assignments
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PAM2401
Features
• Up to 95% Efficiency
• True Output Disconnect
• Inrush Current Limiting When Power On
• Output Current up to 1000mA at V
• Fixed Frequency Operation Up to 1MHz
• 0.9V to 4.75V Input Range
• 2.5V to 5.0V Adjustable Output Voltage
• Guaranteed 1.0V Start-Up
• Programmable Current Limit
• Internal Soft-Start
• Internal Compensation
• Pulse Sipping Mode at Light Load Operation
• Hiccup Mode Short Protection
• Over Voltage Protection
• Over Temperature Protection
• <1µA Shutdown Current
• Power Good Indicator
• MSOP-8 and U-DFN3030-12 packages
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html 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.
= 3V and V
IN
PAM2401
Document number: DS37285 Rev. 1 - 2
OUT
= 5.0V
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Applications
• Handheld Computers
• Cordless Phones
• GPS Receivers
• Battery Backup Supplies
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Typical Applications Circuit
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PAM2401
NEW PRODUCT
Pin Descriptions
MSOP-8 U-DFN3030-12 Name Function
1 1,2 LX Switch Pin
2 3 EN Enables Control Input.
3 4 VIN Input Voltage Pin
-- 5 PG Power Good Indicator Pin, Open Drain Output
4 6 AGND Analog Ground
5 7 FB Feedback Pin Internally Set to 0.6V.
6 8 RSET Current Limit Setting
7 9,10 OUT Output Pin
8 11,12 PGND Power Ground
Exposed Pad EP Thermal Pad of the Package. Can Be Connected to PGND
Functional Block Diagram
PAM2401
Document number: DS37285 Rev. 1 - 2
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Absolute Maximum Ratings (@T
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 Rating Unit
Input Voltage -0.3 to +6.0 V
SW Voltage -0.3 to +6.0 V
SHDN, FB Voltage -0.3 to +6.0 V
V
OUT
Operating Temperature Range -40 to +85 °C
Storage Temperature Range -65 to +125 °C
Lead Temperature (Soldering, 10 sec) 300 °C
Recommended Operating Conditions (@T
Parameter Rating Unit
NEW PRODUCT
Ambient Temperature Range -40 to +85
Junction Temperature Range -40 to +125
= +25°C, unless otherwise specified.)
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-0.3 to +6.0 V
= +25°C, unless otherwise specified.)
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°C
Thermal Information
PAM2401
Parameter Package Symbol Max Unit
Thermal Resistance
(Junction to Case)
Thermal Resistance
(Junction to Ambient)
Internal Power Dissipation
PAM2401
Document number: DS37285 Rev. 1 - 2
MSOP-8
U-DFN3030-12 8.5
MSOP-8
U-DFN3030-12 60
MSOP-8
U-DFN3030-12 1.66
Θ
JC
Θ
JC
P
D
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75
180
0.55
°C/W
W
May 2014
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