ltc4215-1 Linear Technology Corporation, ltc4215-1 Datasheet - Page 7

• Manufacturer Part Number: ltc4215-1
• Description: Hot Swap Controller With Adc And I2c Compatible Monitoring
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
ADIN: ADC Input. A voltage between 0V and 1.235V ap-
plied to this pin is measured by the onboard ADC. Tie to
ground if unused.
ADR0, ADR1: Serial Bus Address Inputs. Tying these pins
to ground, to the INTV
one of 9 possible addresses. See Table 1 in Applications
Information.
EN: Enable Input. Ground this pin to indicate a board is
present and enable the N-channel MOSFET to turn on. When
this pin is high, the MOSFET is not allowed to turn on. An
internal 10μA current source pulls up this pin. Transitions
on this pin are recorded in the Fault register. A high-to-low
0.6
0.5
0.4
0.3
0.2
0.1
0
0
V
OL(GPIO1)
2
V
DD
vs I
= 3.3V, 5V, 12V
–0.1
–0.2
–0.3
–0.4
–0.5
I
4
GPIO1
0.5
0.4
0.3
0.2
0.1
GPIO1
0
0
ADC DNL vs Code (ADIN)
(mA)
CC
6
pin or leaving open confi gures
64
8
4215 G12
CODE
128
10
192
0.006
0.005
0.001
0.004
0.003
0.002
0
0
Total Unadjusted Error
vs Code (ADIN)
4215 G15
256
64
CODE
128
transition activates the logic to read the state of the ON pin
and clear Faults. See Applications Information.
Exposed Pad (Pin 25): Exposed Pad may be left open or
connected to device ground.
FB: Foldback Current Limit and Power Good Input. A
resistive divider from the output is tied to this pin. When
the voltage at this pin drops below 1.235V, power is not
considered good. The power bad condition may result
in the GPIO1 pin pulling low or going high impedance
depending on the confi guration of control register bits
A6 and A7. Also a power bad fault is logged in this condi-
tion if the LTC4215-1 has fi nished the start-up cycle and
–1.0
–0.2
–0.4
–0.6
–0.8
1.0
0.8
0.6
0.4
0.2
0
–50
ADC Full-Scale Error
vs Temperature
192
–25
T
4215 G13
A
= 25°C, V
TEMPERATURE (°C)
256
0
25
DD
–0.1
–0.2
–0.3
–0.4
–0.5
0.5
0.4
0.3
0.2
0.1
0
50
= 12V unless otherwise noted.
0
ADC INL vs Code (ADIN)
75
4215 G05
64
100
LTC4215-1
CODE
128
192
4215 G14
42151f
7
256