MAX16014 Maxim Integrated Products, MAX16014 Datasheet - Page 7

• Manufacturer Part Number: MAX16014
• Description: (MAX16010 - MAX16014) Overvoltage Protection/Detection Circuits
• Manufacturer: Maxim Integrated Products

Figure 2. Typical Operating Circuit for the MAX16012
The MAX16013/MAX16014 can be configured as an
overvoltage switch controller to turn on/off a load (see
the Typical Application Circuit). When the programmed
overvoltage threshold is tripped, the internal fast com-
parator turns off the external p-channel MOSFET (P2),
pulling GATE2 to V
from the load. When the monitored voltage goes below
the adjusted overvoltage threshold, the MAX16013
enhances GATE2, reconnecting the load to the power
source (toggle ENABLE on the MAX16014 to reconnect
the load). The MAX16013 can be configured as an
overvoltage limiter switch by connecting the resistive
divider to the load instead of V
Overvoltage Limiter section.
Connect a 5.5V to 72V supply to V
tion. For noisy environments, bypass V
0.1µF or greater capacitor. When V
UVLO voltage the following states are present (Table 1).
Table 1. UVLO State (V
MAX16010
MAX16011
MAX16012
MAX16013
MAX16014
PART
R1
R2
V
BATT
OUTA
Low
Low
—
—
IN+
REF
IN-
_______________________________________________________________________________________
CC
Low
Low, LOGIC = low
High, LOGIC = high
to disconnect the power source
MAX16012
GND
V
OUTB
CC
Ultra-Small, Overvoltage Protection/
—
—
CC
CC
< V
CC
OUT
(Figure 3). See the
Supply Voltage
CC
CC
for proper opera-
UVLO
falls below the
OUT
to GND with a
Low
—
—
—
R
PULLUP
)
OUT
GATE2
High
—
—
—
Hysteresis adds noise immunity to the voltage monitors
and prevents oscillation due to repeated triggering
when the monitored voltage is near the threshold trip
voltage. The hysteresis in a comparator creates two trip
points: one for the rising input voltage (V
for the falling input voltage (V
shown in Figure 4.
The MAX16011 offers an active-high enable input (EN),
while the MAX16010 offers both an active-high enable
input (EN) and active-low enable input (EN). For the
MAX16010, drive EN low or EN high to force the output
low. When the device is enabled (EN = high and EN =
low) the state of OUTA and OUTB depends on INA+
and INB- logic states.
Figure 3. Overvoltage Limiter Protection
Figure 4. Input and Output Waveforms
V
V
OUT
V
IN+
BATT
V
V
V
TH+
TH-
0V
CC
V
HYST
Detection Circuits
P1
GATE1
t
PROP
Enable Inputs (EN or
MAX16013
GND
V
CC
TH-
). These thresholds are
GATE2
SET
t
PROP
P2
Hysteresis
TH+
) and one
R1
R2
EN )
t
PROP
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