MAX16946EVKIT# Maxim Integrated Products, MAX16946EVKIT# Datasheet - Page 4

• Manufacturer Part Number: MAX16946EVKIT#
• Description: Power Management Modules & Development Tools 18V Remote Antenna C urrent-Sense and LDO
• Manufacturer: Maxim Integrated Products
• Type: Current Monitors & Regulatorsr

Specifications of MAX16946EVKIT#

• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 4.5 V to 18 V
• Product: Power Management Development Tools
• For Use With/related Products: MAX16946
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MAX16946 Evaluation Kit
The MAX16946 EV kit is an assembled and tested PCB
used to evaluate the MAX16946 high-voltage, high-side,
current-sense LDO/switch. The EV kit operates from a
4.5V to 18V DC supply voltage. The EV kit demonstrates
the device’s open-drain fault signals (OL, SC), open-load
and current-limiting threshold-setting inputs (OLT, LIM),
LDO/switch operation and shutdown function (SHDN), as
well as the analog voltage output (AOUT).
The EV kit provides LEDs D2 and D3 to facilitate the
monitoring of the short-circuit, open-drain and open-load
fault signals, respectively. The open-load threshold-
setting input is set to approximately 16mA and the
current-limiting threshold is set to approximately 150mA.
The short-circuit detection threshold is set by 0.5I (R1)
to 100mA. An on-board LDO (U3) is provided to support
single-supply evaluation. The LDO is powered by the
input voltage (VIN) and provides a 5V output used to
power the fault indicator and pulse generator (U2).
The EV kit includes LED D2 to monitor the short-circuit
fault signal and D3 to monitor the open-load fault signal.
Both LED networks are driven by the on-board 5V LDO
(U3). To monitor the indicator outputs by external means,
remove the shunt from JU6 and connect the monitor sys-
tem to the OL and SC PCB pads on the EV kit. Ensure
that the monitoring system provides pullup resistors on
the OL and SC open-drain indicator output signals.
The open-load threshold setting is configured by the
resistor-divider between the device’s REF and OLT pins
and is set to 16mA by default.
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Detailed Description of Hardware
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Open-Drain Fault Signals (OL, SC)
Open-Load Threshold
When the shunt of JU1 is in the 1-2 position, the shunt of
JU3 is installed, and the shunt of JU4 is not installed, the
device is set as a 5V LDO through the resistor-divider of
R6 and R7. When the shunt of JU1 is in the 1-3 position,
the shunt of JU3 is not installed, and the shunt of JU4
is installed, the device is set as an 8V LDO through the
resistor-divider of R8 and R9. To set the output to 8.5V,
the shunt of JU1 must be in the 1-5 position, which con-
nects the FB pin to REG.
The device is a switch when the shunt of JU1 is in the
1-4 position, which connects the FB pin to ground. The
voltage applied at the input is approximately the voltage
at the output.
When the SHDN pin is pulled high, the EV kit is in normal
operation. The EV kit can enter shutdown by placing the
shunt of JU2 in the 1-4 position.
Once the open load is detected, the OL output latches
low and the output voltage stays on. To unlatch the open-
load indicator (OL back to high), place the shunt of JU2
in the 1-3 position and press the SW1 switch to apply
a pulse less than 150Fs at the SHDN pin of the device.
Shutdown (SHDN)
Pulse Generator
Switch
LDO