MAX6880 データシートの表示（PDF） - Maxim Integrated
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MAX6880 Datasheet PDF : 19 Pages
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Dual-/Triple-Voltage, Power-Supply
Sequencers/Supervisors
Pin Description
MAX6880
1, 11,
12, 15
PIN
MAX6881 MAX6882
—
—
MAX6883
1, 8, 9, 10
NAME
FUNCTION
N.C. No Connection. Not internally connected.
Internal Supply Bypass Input. Bypass ABP with a 1µF capacitor to
2
—
1
—
ABP GND. ABP maintains the device supply voltage during rapid power-
down conditions.
3
2
—
—
SET3 Externally Adjusted IN_ Undervoltage Lockout Threshold. Connect
4
3
2
2
SET2 SET_ to an external resistor-divider network to set the desired
undervoltage threshold for each IN_ supply (see the Typical
5
4
3
3
SET1 Application Circuit). All SET_ inputs must be above the internal
SET_ threshold (0.5V) to enable sequencing functionality.
Logic-Enable Input or Undervoltage Lockout Monitor Input. EN/UV
must be high (EN/UV > VEN_R) to enable voltage sequencing
6
5
4
4
EN/UV power-up operation. OUT_ begins tracking down when EN/UV <
VEN_F. Connect EN/UV to an external resistor-divider network to set
the external UVLO threshold.
7
6
5
5
GND Ground
Sequence Delay Select Input. Connect a capacitor from DELAY
to GND to select the desired delay period before sequencing is
8
7
6
6
DELAY enabled (after all SET_ inputs and EN/UV are above their respective
thresholds) or between supply sequences. Leave DELAY
unconnected for the default 200µs delay period.
9
8
7
7
SLEW Slew-Rate Adjustment Input. Connect a capacitor from SLEW
to GND to select the desired OUT_ slew rate.
PG/RST Timeout Period Adjust Input. PG/RST asserts high after the
timeout period when all OUT_ exceed their IN_ referenced
10
—
8
—
TIMEOUT threshold. Connect a capacitor from TIMEOUT to GND to set the
desired timeout period. Leave TIMEOUT unconnected for the
default 200µs delay period.
Margin Input, Active-Low. Drive MARGIN low to enable margin
mode (see the Margin section). The MARGIN functionality is
13
—
9
—
MARGIN disabled (returns to normal monitoring mode) after MARGIN returns
high. MARGIN is internally pulled up to ABP through a 10µA
current source.
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