A Product Line of
Diodes Incorporated
PAM2316
2.5MHz, FAST TRANSIENT 2A STEP-DOWN CONVERTER
Description
The PAM2316 is a 2A step-down sync converter. The 2.5MHz
switching frequency enables the use of small external components.
The ultra-small 2mm x 2mm footprint and high efficiency make the
PAM2316 an ideal choice for portable applications.
The PAM2316 delivers A maximum output current while consuming
only 55µA no load quiescent current. Low R
DS(ON)
integrated
MOSFETs and 100 duty cycle operation make the PAM2316 the ideal
choice for high output voltage, high current applications which require
a low dropout threshold.
The PAM2316 provides excellent transient response and output
accuracy across the operating range.
The PAM2316 maintains high efficiency throughout the load range.
The PAM2316 automatically optimizes efficiency during light load
mode (PSM) and maintains constant frequency and low output ripple
during PWM mode.
Over-temperature and short circuit protection safeguard the PAM2316
and system components from damage.
The PAM2316 is available in a Pb-free, ultrasmall, low profile, 8-pin
2mmx2mm TDFN package. The product is rated over a temperature
range of -40°C to +85°C.
Pin Assignments
Applications
Cellular Phone
Digital Cameras
Hard Disk Drives
MP3 Players
PDAs and Handheld Computers
Portable Media Players
USB Devices
Wireless Network Cards
Features
2A Maximum Output Current
Tiny 1.0µH Chip Inductor
Excellent Transient Response
Input Voltage: 2.7V to 5.5V
Ultra-small, Low Profile 8-pin 2mmx2mm TDFN Package
Fixed or Adjustable Output Voltage
-
Adjustable Output Voltage: 1.0V to 3.3V
High Efficiency with 2.5MHz Switching Frequency
55µA No Load Quiescent Current
100% Duty Cycle Low-Dropout Operation
Internal Soft Start
Over-Temperature and Current Limit Protection
<1µA Shutdown Current
-40°C to +85°C Temperature Range
Pb-Free/Halogen Free Package
RoHS/REACH Compliant
PAM2316
Document number: DSxxxxx Rev. 1 - 1
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www.diodes.com
November 2012
© Diodes Incorporated
A Product Line of
Diodes Incorporated
PAM2316
Typical Applications Circuit
V
OUT
= 0.6* (1+R1/R2)
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7, 8
Pin
Name
PGND
PVIN
VIN
FB
AGND
EN
SW
Function
Main power ground return pin. Connect to the output and input capacitor return.
Input power supply tied to the source of the high side P-channel MOSFET.
Power supply; supplies power for the internal circuitry.
Feedback input pin. Feedback voltage to internal error amplifier, the threshold voltage is 0.6V.
Analog ground. This pin is internally connected to the analog ground of the control circuitry.
Enable pin. A logic low disables the converter and it consumes less than 1μA of current.When connected high, it
resumes normal operation.
Switching node. Connect the inductor to this pin. It is internally connected to the drain of both high and low side
MOSFETs.
Functional Block Diagram
PAM2316
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© Diodes Incorporated
A Product Line of
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PAM2316
Absolute Maximum Ratings
(@T
A
= +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
EN, FB Pin Voltage
SW Pin Voltage
Junction Temperature
Storage Temperature Range
Soldering Temperature
Rating
-0.3 to +6.5
-0.3 to V
IN
-0.3 to (V
IN
+0.3)
150
-65 to +150
300, 5sec
Unit
V
V
V
°C
°C
°C
Recommended Operating Conditions
(@T
A
= +25°C, unless otherwise specified.)
Parameter
Supply Voltage
Operation Temperature Range
Junction Temperature Range
Rating
2.7 to 5.5
-40 to +85
-40 to +125
Unit
V
°C
Thermal Information
Parameter
Thermal Resistance (Junction to Case)
Thermal Resistance (Junction to Ambient)
Internal Power Dissipation
Package
TDFN22-8
TDFN22-8
TDFN22-8
Symbol
θ
JC
θ
JA
P
D
Max
23.4
70
1.4
Unit
°C/W
W
PAM2316
Document number: DSxxxxx Rev. 1 - 1
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November 2012
© Diodes Incorporated
A Product Line of
Diodes Incorporated
PAM2316
Electrical Characteristics
(@T
A
= +25°C, V
IN
= 3.3V, V
OUT
= 1.2V, C
IN
= 10µF, C
O
= 10µF, L = 1µH, unless otherwise specified.)
Parameter
Input Voltage Range
UVLO Threshold
Output Voltage Range
Output Voltage Accuracy
Regulated Feedback Voltage
PMOS Current Limit
Output Voltage Line Regulation
Output Voltage Load Regulation
Quiescent Current
Shutdown Current
Oscillator Frequency
Drain-Source On-State Resisitance
SW Leakage Current
Start-Up Time
PSM Threshold
EN Threshold High
EN Threshold Low
EN Leakage Current
Over Temperature Protection
OTP Hysteresis
Symbol
V
IN
V
UVLO
V
OUT
V
OUT
V
FB
I
LIM
LNR
LDR
I
Q
I
SD
f
OSC
R
DS(ON)
ILSW
T
S
I
TH
V
EH
V
EL
I
EN
OTP
OTH
1.4
±0.01
150
30
0.4
V
IN
= 3.3V, V
O
= 1.2V
250
250
450
I
DS
= 100mA
P MOSFET
N MOSFET
V
IN
= 3.3V to 4V
I
O
= 1mA to 2A
No Load
V
EN
= 0V
2.5
105
70
1
-2
55
I
O
= 0 to 2A
No Load
V
IN
Rising
Hysteresis
V
IN
Falling
2
1
-3.0
0.591
0.600
3.0
0.3
+2
90
1
1.2
3.3
+3.0
0.609
Test Conditions
Min
2.7
Typ
3.3
2.6
250
Max
5.5
2.7
Units
V
V
mV
V
V
%
V
A
%/V
%
µA
µA
MHz
mΩ
mΩ
µA
µs
mA
V
V
µA
°C
°C
PAM2316
Document number: DSxxxxx Rev. 1 - 1
4 of 11
www.diodes.com
November 2012
© Diodes Incorporated
A Product Line of
Diodes Incorporated
PAM2316
Typical Performance Characteristics
(@T
A
= +25°C, C
IN
= 22*2µF, C
O
= 22µF, unless otherwise specified.)
PAM2316
Document number: DSxxxxx Rev. 1 - 1
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November 2012
© Diodes Incorporated
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