MAX16946EVKIT# Maxim Integrated Products, MAX16946EVKIT# Datasheet - Page 15

• 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

Table 1. MAX16946/MAX16947 Status Truth Table
It is possible for OUT to be shorted to the battery due to
a fault in the system. The devices detect this failure by
comparing the OUT voltage and the IN voltage before
the switch turns on. Every time the switch turns on, such
as at the end of the retry time, or once the thermal shut-
down condition disappears, the short-to-battery detec-
tion is performed. At this point, if the device detects the
short-to-battery fault, the switch stays off and both SC
and OL assert low (Table 1).
Series inductance and the output capacitor can produce
ringing during a short-circuit condition, resulting in an
output voltage that temporarily exceeds the input volt-
age. Blanking is implemented during and immediately
after a short-circuit event to prevent false triggering of
the reverse-current detection. The reverse-current blank-
ing time (t
rent produces a V
(typ) for a duration greater than the blanking time, the
device latches off the switch and both SC and OL assert
low.
Thermal-shutdown circuitry protects the devices from
overheating. The switch turns off immediately when the
junction temperature exceeds +170NC (typ) (Table 1).
The switch turns on again after the device temperature
drops by approximately +15NC (typ). Thermal shutdown
is indicated by 0V on AOUT.
The devices include undervoltage lockout circuitry
(UVLO) to prevent erroneous switch operation when the
SC
1
0
1
0
1
Short-to-Battery and Reverse-Current Detection
Undervoltage and Overvoltage Lockout
OL
1
1
0
0
1
REV_BLANK
(I
(I
(I
LOAD
LOAD
LOAD
0.4 after switching off
______________________________________________________________________________________
SENSE
O R
O R
O R
V
) is 16ms (typ). If the reverse cur-
AOUT
SENSE
SENSE
SENSE
(V
0
IN
Remote Antenna, Current-Sense and
(V)
) O 26 + 0.4
) O 26 + 0.4
) O 26 + 0.4
- V
SENSE
Thermal Shutdown
) less than -7.7mV
Normal operation
Short circuit
Open load
Reverse current (on-state)
OUT short-to-battery (off-state),
V
Thermal shutdown, V
overvoltage, V
REF undervoltage
OUT
too high ( LDO mode)
DEVICE STATUS
IN
undervoltage
IN
input voltage goes below 3.5V (typ) during startup and
brownout conditions. Input voltages of less than 3.5V
inhibit operation of the device by turning off the internal
charge pump and the switch.
These devices also feature an overvoltage lockout
(OVLO) threshold of 21V (typ). When V
V
the internal charge pump.
The devices feature an active-low shutdown input
(SHDN) to place them into a low-power shutdown mode.
The devices turn off and consume a 7FA maximum (at
V
low for greater than 360Fs. Driving SHDN high initiates
a device turn-on with short-to-battery detection. Pulsing
SHDN low for less than t
The devices feature a 3V bandgap reference output, sta-
ble over supply voltage and temperature. The reference
has a current drive capability of 100FA. Use resistive
dividers connected to REF to set the open-load current
threshold and the current-limit threshold. Do not use REF
to drive external circuitry.
The devices feature an internal regulator that regulates
the input voltage to +5V to power all internal circuitry.
Bypass the regulator output (REG) to GND with a 1FF
ceramic capacitor. Do not use this regulator to power
external circuitry.
OVLO
IN
= 12V) of shutdown current when SHDN is driven
, the device immediately turns off the switch and
Internal +5V Linear Regulator (REG)
None
Autoretry
OL latched low
Switch/LDO latched off
Switch/LDO turned off as long as condition
persists
Switch/LDO and AOUT turns off as long as
condition persists
Switch/LDO, AOUT, and REF turned off as
long as condition persists
LDO/Switches
SHDN_OFF
Internal Reference (REF)
ACTION TAKEN
Shutdown (SHDN)
clears the OL output.
IN
is greater than
15