MAX1614EUA+ Maxim Integrated Products, MAX1614EUA+ Datasheet - Page 7

• Manufacturer Part Number: MAX1614EUA+
• Description: IC DVR MOSFET HI-SIDE NCH 8-UMAX
• Manufacturer: Maxim Integrated Products
• Type: High Side Driverr

Specifications of MAX1614EUA+

• Configuration: High-Side
• Input Type: Non-Inverting
• Number Of Configurations: 1
• Number Of Outputs: 1
• Voltage - Supply: 5 V ~ 26 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Product: Driver ICs - Various
• Supply Voltage (max): 26 V
• Supply Voltage (min): 5 V
• Supply Current: 21 uA
• Maximum Power Dissipation: 330 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 1
• Output Current: 60 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Delay Time: -
• Current - Peak: -
• High Side Voltage - Max (bootstrap): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The MAX1614’s separate on and off inputs allow maxi-
mum flexibility in controlling the external MOSFETs.
Connect a pushbutton switch to the ON pin and micro-
controller (µC) I/O for single-button control. Connect the
OFF pin to another µC I/O pin. On the first button
depression, the MAX1614 turns on automatically; the
signal is also detected by the µC. When the button is
depressed a second time, the µC wraps around and
turns off the MAX1614 by pulling low on the OFF pin
(Figure 3).
Figure 2. Single-Line Shutdown Control
Figure 3. Single-Pushbutton On/Off Control
R1
R2
SHUTDOWN
(CMOS OR TTL LOGIC)
BATT
LBI
_______________________________________________________________________________________
GATE
Single Pushbutton Switch
N
MAX1614
GND
OFF
On/Off Control with a
SRC
GND
MAX1614
LBO
OFF
ON
N
ON
High-Side, N-Channel MOSFET
TO µC
LOAD
A simple undervoltage disconnect circuit is often desir-
able to prevent damage to secondary batteries due to
repeated deep discharge or cell reversal. The Typical
Operating Circuit turns off the MAX1614, disconnecting
the battery from the load when the battery voltage
falls below the minimum battery voltage required,
(V
V
cells are installed or the batteries are recharged, a µC
or pushbutton reconnects the load.
Many applications require an early warning indicating
that power is failing so that the microprocessor (µP)
can take care of any “housekeeping” functions (storing
current settings in memory, etc.) before the power fails.
Connect LBI through a resistor divider across the bat-
tery, and connect LBO to the µP nonmaskable interrupt
(NMI). Set the threshold so that LBO goes low when the
battery decays to a point where regulation begins to
degrade (Figure 4). V
where V
housekeeping is complete, the µP can turn off the load
by pulling OFF low.
Figure 4. Using LBO to Generate Early Power-Fail Interrupt
TH
LOW BATT
is the LBI input threshold (1.20V typ). When fresh
R1
R2
Simple Low-Battery Disconnect/Fresh
TH
is the LBI input threshold (1.20V typ). Once
). V
LOW BATT
BATT
LBI
Using LBO to Generate Early
GATE
LOW BATT
N
MAX1614
Battery Reconnect Circuit
Switch Driver
GND
= (R1 + R2) / R2 x V
SRC
Power-Fail Interrupt
OFF
LBO
= (R1 + R2) / R2 x V
ON
N
TO µC
NONMASKABLE
INTERRUPT
TO µC
PORT PINS
LOAD
TH
where
TH,
7