MAX16023LTAT25T 데이터 시트보기 (PDF) - Maxim Integrated
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MAX16023LTAT25T Datasheet PDF : 17 Pages
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Battery-Backup Circuits with
Regulated Output Voltage
PIN
MAX16023 MAX16024
1
2
2
3
3
4
4
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5
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6
7
7
8
8
9
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1
—
5
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6
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10
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—
Pin Description
NAME
FUNCTION
VCC
BATT
MR
PFI
PFO
GND
RESET
OUT
CEIN
SET
BATT ON
CEOUT
EP
Supply Voltage Input. Bypass VCC to GND with a 0.1µF capacitor.
Backup Battery Input. If VCC falls below its reset threshold (VTH), VBATT ≥ VCC, and if
the regulator enters dropout, the regulator is powered from BATT. If VBATT < VCC,
the regulator is powered from VCC. Bypass BATT to GND with a 0.1µF capacitor.
Active-Low, Manual-Reset Input. RESET asserts when MR is pulled low. RESET
remains low for the duration of reset timeout period after MR transitions from low to
high. Connect MR to OUT or leave unconnected if not used. MR is internally
connected to VCC through a 30kΩ pullup resistor.
Power-Fail Comparator Input. Connect PFI to a resistive divider to set the desired PFI
threshold. The PFI input is referenced to an internal VPFT threshold. A VPFI-HYS
internal hysteresis provides noise immunity. The power-fail comparator is powered
from OUT.
Active-Low, Power-Fail Comparator Output. PFO goes low when VPFI falls below the
internal VPFT threshold and goes high when VPFI rises above VPFT + VPFI-HYS
hysteresis.
Ground
Active-Low Reset Output. RESET asserts when VCC falls below the reset threshold or
MR is pulled low. RESET remains low for the duration of the reset timeout period after
VCC rises above the reset threshold and MR goes high. RESET is available in push-
pull and open-drain options.
Linear Regulator Output Voltage. Available in the following factory-fixed voltages of
1.2V, 1.8V, 2.5V, 3.0V, or 3.3V for all devices. The MAX16024 is also available with
an adjustable output voltage (1.8V to 5.25V). Bypass OUT to GND with a 10µF
capacitor.
Chip-Enable Input. The input to CE gating circuitry. Connect to GND or OUT if not
used.
Set Output Voltage Input. For the fixed output voltage versions (MAX16024_TB_ _ _),
SET is not used. Connect SET to GND. For MAX16024_TB_, connect SET to an
external resistive divider to set the desired output voltage between 1.8V and 5.25V.
Active-High, Battery-On Output. BATT ON goes high when in the battery backup
mode.
Active-Low, Chip-Enable Output. CEOUT goes low only when CEIN is low and reset
is not asserted. If CEIN is low when reset is asserted, CEOUT stays low for 12µs (typ)
or until CEIN goes high, whichever occurs first.
Exposed Pad. Internally connected to GND. Connect EP to a large ground plane to
aid heat dissipation. Do not use EP as the only ground connection for the device.
8 _______________________________________________________________________________________
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