Abstract: Provide is an apparatus for controlling a battery circuit, a vehicle having the same, and a control method thereof, the apparatus including: a power supply including at least one battery, and at least two low voltage DC-DC Converters (LDCs) electrically connected to the battery and configured to drop an input voltage and supply the voltage to one of a first load and a second load; and a controller including a processor configured to process a signal received from the LDC, wherein the controller is configured to, based on the signal received from the LDC being processed, identify a failure of at least one of the LDCs; and in response to the failure being identified, control a LDC other than the LDC, of which the failure is identified.