ADP2503-3.5-EVALZ Analog Devices Inc, ADP2503-3.5-EVALZ Datasheet - Page 5
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ADP2503-3.5-EVALZ
Manufacturer Part Number
ADP2503-3.5-EVALZ
Description
BOARD EVALUATION ADP2503 3.5V
Manufacturer
Analog Devices Inc
Datasheets
1.ADP2503ACPZ-R7.pdf
(16 pages)
2.ADP2503-BL1-EVZ.pdf
(8 pages)
3.ADP2503-3.5-EVALZ.pdf
(16 pages)
Specifications of ADP2503-3.5-EVALZ
Main Purpose
DC/DC, Step Up or Down
Outputs And Type
1, Non-Isolated
Power - Output
2.1W
Voltage - Output
3.5V
Current - Output
600mA
Voltage - Input
2.5 ~ 5.5V
Regulator Topology
Buck-Boost
Frequency - Switching
2.5MHz
Board Type
Fully Populated
Utilized Ic / Part
ADP2503
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
EP
Mnemonic
VOUT
SW2
PGND
SW1
PVIN
EN
SYNC
VIN
AGND
FB
Paddle
Description
Output of the ADP2503/ADP2504. Connect the output capacitor between VOUT and PGND.
Power Switch 2 Connection. This is the internal connection to the input PMOS and NMOS switches. Connect
SW2 to the inductor with a short, wide track.
Power GND. Connect the input and output capacitors and the PGND pin to a PGND plane.
Power Switch 1 Connection. This is the internal connection to the output PMOS and NMOS switches. Connect
SW1 to the inductor with a short, wide track.
Power Input. This the input to the buck-boost power switches. Place a 10 μF capacitor between PVIN and
PGND as close as possible to the ADP2503/ADP2504.
Enable. Drive EN high to turn on the ADP2503/ADP2504. Bring EN low to put the part into shutdown mode.
The SYNC pin permits the ADP2503/ADP2504 to operate in three different modes.
Normal operation: with SYNC driven low, the ADP2503/ADP2504 operate at 2.5 MHz PWM mode for heavy
and medium loads, and moves to power save mode (PSM) mode for light loads.
Forced PWM operation: with SYNC driven high, the ADP2503/ADP2504 operate at fixed 2.5 MHz PWM mode
for all load conditions.
SYNC mode: to synchronize the ADP2503/ADP2504 switching to an external signal, drive this pin with a clock
between 2.2 MHz and 2.8 MHz. The SYNC signal must have on and off times greater than 160 ns.
Analog Power Supply. This is the supply for the ADP2503/ADP2504 internal circuitry.
Analog Ground.
Output Feedback. This is an input to the internal error amplifier.
Connect the paddle to PGND.
PGND
VOUT
PVIN
SW2
SW1
*CONNECT PADDLE TO GND.
1
2
3
4
5
Figure 2. Pin Configuration
(Not to scale)
ADP2503/
Rev. 0 | Page 5 of 16
ADP2504
TOP VIEW
10 FB
9
8
7
6
AGND
VIN
SYNC
EN
ADP2503/ADP2504