ADP2503-4.2-EVALZ Analog Devices Inc, ADP2503-4.2-EVALZ Datasheet - Page 12

• Manufacturer Part Number: ADP2503-4.2-EVALZ
• Description: BOARD EVALUATION ADP2503 4.2V
• Manufacturer: Analog Devices Inc

Specifications of ADP2503-4.2-EVALZ

• Main Purpose: DC/DC, Step Up or Down
• Outputs And Type: 1, Non-Isolated
• Power - Output: 2.52W
• Voltage - Output: 4.2V
• 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

ADP2503/ADP2504
UNDERVOLTAGE LOCKOUT
The undervoltage lockout circuit prevents the device from oper-
ating incorrectly at low input voltages. It prevents the converter
from turning on the power switches under undefined conditions
and, therefore, prevents deep discharge of the battery supply.
V
operation, if V
are disabled until the supply exceeds the UVLO rising threshold.
THERMAL SHUTDOWN
When the junction temperature, T
the device goes into thermal shutdown. In this mode, the power
switches are turned off. The device resumes operation when the
junction temperature again falls below 125°C typical.
IN
must be greater than 2.25 V to enable the converter. During
IN
drops below 2.10 V, the ADP2503/ADP2504
J
, exceeds 150°C typical,
Rev. A | Page 12 of 16
SHORT-CIRCUIT PROTECTION
When the nominal inductor peak current value of 1.5 A is
reached, the ADP2503/ADP2504 first switch off the NMOS2
transistor if it is active. If the current thereafter continues to
increase by an extra amount of 200 mA, the PMOS1 transistor
is also switched off. This operation is reversible when the short
circuit stops. It allows the inductor current ripple to be mini-
mized close to 1.5 A and, thus, the controller to restore V
even if a high load current is maintained after the short circuit.
REVERSE CURRENT LIMIT
In case of a short circuit on V
expected, the inductor current becomes negative (reverse
current). The negative peak value is limited to 1.1 A by
deactivating the PMOS2 switch.
OUT
to a value greater than
OUT