Diodes PAM2316 User Manual
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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
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.
DS(ON)
integrated
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
Pin Assignments
Applications
Cellular Phone
Digital Cameras
Hard Disk Drives
MP3 Players
PDAs and Handheld Computers
Portable Media Players
USB Devices
Wireless Network Cards
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Typical Applications Circuit
Pin Descriptions
Pin
Number
1 PGND
2 PVIN
3 VIN
4 FB
5 AGND
6 EN
7, 8 SW
Pin
Name
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
V
= 0.6* (1+R1/R2)
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PAM2316
Function
PAM2316
Document number: DSxxxxx Rev. 1 - 1
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PAM2316
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 +6.5 V
EN, FB Pin Voltage
SW Pin Voltage
Junction Temperature 150 °C
Storage Temperature Range -65 to +150 °C
Soldering Temperature 300, 5sec °C
Recommended Operating Conditions (@T
Parameter Rating Unit
Supply Voltage 2.7 to 5.5 V
Operation Temperature Range -40 to +85
Junction Temperature Range -40 to +125
= +25°C, unless otherwise specified.)
A
-0.3 to V
-0.3 to (V
+0.3)
IN
IN
= +25°C, unless otherwise specified.)
A
V
V
°C
Thermal Information
Parameter Package Symbol Max Unit
Thermal Resistance (Junction to Case) TDFN22-8
Thermal Resistance (Junction to Ambient) TDFN22-8
Internal Power Dissipation TDFN22-8
PAM2316
Document number: DSxxxxx Rev. 1 - 1
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θ
θ
P
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JC
JA
D
23.4
70
1.4 W
°C/W
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PAM2316
Electrical Characteristics (@T
Parameter Symbol Test Conditions Min Typ Max Units
Input Voltage Range
UVLO Threshold
Output Voltage Range
Output Voltage Accuracy
Regulated Feedback Voltage
PMOS Current Limit
Output Voltage Line Regulation LNR
Output Voltage Load Regulation LDR
Quiescent Current
Shutdown Current
Oscillator Frequency
Drain-Source On-State Resisitance
SW Leakage Current ILSW 1 µA
Start-Up Time
PSM Threshold
EN Threshold High
EN Threshold Low
EN Leakage Current
Over Temperature Protection OTP 150 °C
OTP Hysteresis OTH 30 °C
PAM2316
Document number: DSxxxxx Rev. 1 - 1
= +25°C, VIN = 3.3V, V
A
IN
V
Rising
IN
Hysteresis 250 mV
V
V
UVLO
VIN Falling
V
V
V
I
f
R
DS(ON)
V
V
OUT
OUT
LIM
I
I
SD
OSC
T
I
TH
I
EN
IO = 0 to 2A
No Load 0.591 0.600 0.609 V
FB
V
= 3.3V to 4V
IN
I
= 1mA to 2A
O
No Load 55 90 µA
Q
VEN = 0V
IDS = 100mA
250 µs
S
VIN = 3.3V, VO = 1.2V
V
EH
1.4 0.4 V
EL
±0.01 µA
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= 1.2V, CIN = 10µF, CO = 10µF, L = 1µH, unless otherwise specified.)
OUT
2.7 3.3 5.5 V
2.6 2.7 V
2 V
1 1.2 3.3 V
-3.0 +3.0 %
3.0 A
0.3 %/V
-2 +2 %
1 µA
2.5 MHz
P MOSFET 105 mΩ
N MOSFET 70 mΩ
250 450 mA
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