The A8652/53 is a high output current synchronous Buck
regulator that provides tight load regulation over a wiring
harness without the need for remote sense lines. This remote load
regulation is achieved with an integrated open-loop correction
scheme that, given a known wiring harness resistance, adjusts
the output voltage based on the measured load current and a
user programmable gain, achieving ±2% accuracy at 500 mV
of correction. The Remote Load Regulation control includes a
115% regulated voltage clamp in conjunction with a dynamic
over voltage protection with OVP threshold changing with the
correction voltage. The A8652/53 includes a user configurable
load side current limit to fold back the output voltage during an
output over current condition. The A8652/53 regulates nominal
input voltages from 4.0 V to 36 V and remains operational when
VIN drops as low as 2.6 V. When the input voltage approaches
the output voltage, the duty cycle is maximized to maintain
the output voltage.
The A8652/53’s features include externally set soft-start time,
external compensation network, an EN input to enable VOUT, a
SYNC/FSET input to synchronize or set the PWM switching
frequency, and a PowerOK output to indicate when VOUT is within
regulation and there is no load side current limit condition. Protection
features include VIN under-voltage-lockout, cycle-by-cycle current
limit, hiccup mode short-circuit protection, dynamic over-voltage
protection, and thermal shutdown. A8652/53 provides open-circuited,
adjacent pin short-circuit, and short-to-ground protection at every
pin to satisfy the most demanding automotive and non-automotive
applications.
The A8652/53 device is available in a 16-pin eTSSOP package with
exposed pads for enhanced thermal dissipation. It is lead (Pb) free,
with 100% matte tin lead frame plating. The maximum junction
temperature (TJ(max)) is 150°C.
