MAX4827ELT-T Maxim Integrated, MAX4827ELT-T Datasheet - Page 7

• Manufacturer Part Number: MAX4827ELT-T
• Description: Power Switch ICs - Power Distribution
• Manufacturer: Maxim Integrated

Specifications of MAX4827ELT-T

• Number Of Outputs: 1
• Operating Supply Voltage: 2.3 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: UDFN-6
• Minimum Operating Temperature: - 40 C

Figure 1. MAX4826–MAX4831 No-Load Flag Response
The MAX4826–MAX4831 feature a current-limit fault
output, FFLG. Whenever a current-limit fault is activat-
ed, FFLG goes low and the switch turns off. FFLG is an
open-drain output transistor and requires an external
pullup resistor from FFLG to IN. During shutdown (ON
is low), the pulldown on the FFLG output is released to
limit power dissipation. FFLG goes low when any of the
following conditions occur:
The MAX4826–MAX4831 feature a no-load flag output,
NOLD (Figure 1). This output is pulled low every time
the current coming out of the switch is less than 10mA
(MAX4826–MAX4829), or 5mA (MAX4830/MAX4831).
NOLD is an open-drain output transistor and requires
an external pullup resistor from NOLD to a supply up to
+5.5V. Current through the switch is intended to be
positive (from IN to OUT), and for currents that are
large in magnitude but negative in sign (OUT to IN),
NOLD asserts low. For options with the autoretry fea-
ture (MAX4827/MAX4829/MAX4831), the NOLD output
is high impedance during the t
ward-current-limit condition is present. However, NOLD
is pulled low if a reverse current-limit condition is pre-
sent during the t
present at the output of NOLD that gives a 60µs delay
when a no-load condition is asserted. Deassertion of
NOLD is not delayed. During shutdown (ON is low), the
pulldown on NOLD is released to limit power dissipation.
CURRENT
STATUS
• The die temperature exceeds the thermal shut-
• The device is in current limit for more than the
• V
NOLD
LOAD
V
V
ON
IN
down temperature limit of +150°C.
fault-blanking period.
IN
is below the UVLO threshold.
50mA/100mA Current-Limit Switches with
RETRY
_______________________________________________________________________________________
period. A constant time filter is
60μs
THRESHOLD
NO-LOAD
RETRY
NOLD Indicator
FFLG Indicator
period when a for-
CURRENT
60μs
LIMIT
When the forward- or reverse-current-limit threshold is
exceeded, the t
The timer resets if the overcurrent condition disappears
Figure 3. MAX4826/MAX4828/MAX4830 Latchoff Fault
Blanking
Figure 2. MAX4827/MAX4829/MAX4831 Autoretry Fault
Blanking Diagram
NO-LOAD Flag in µDFN
CURRENT
SWITCH
PIN STATUS
PIN STATUS
STATUS
Autoretry (MAX4827/MAX4829/MAX4831)
LOAD
CURRENT
CURRENT
VOLTAGE
VOLTAGE
SWITCH
SWITCH
OFF
STATUS
STATUS
ON PIN
ON
IN PIN
LOAD
FFLG
LOAD
FFLG
OFF
OFF
ON
ON
t
BLANK
BLANK
t
BLANK
t
BLANK
t
RETRY
timer begins counting (Figure 2).
UVLO
t
t
(a)
(b)
BLANK
BLANK
t
BLANK
t
BLANK
CURRENT
CONDITION
REMOVED
LIMIT
SHORT
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