MAX14586 Datasheet, PDF (8/9 Pages) Maxim Integrated Products – High-Current Overvoltage Protectors with Adjustable OVLO

MAX14586/MAX14590
High-Current Overvoltage Protectors
with Adjustable OVLO
RC
1MΩ
RD
1.5kΩ
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
Cs
100pF
STORAGE
CAPACITOR
Figure 2a. Human Body ESD Test Model
DEVICE
UNDER
TEST
IP 100%
90%
AMPERES
36.8%
10%
0
0 _tRL
I_R
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
TIME
tDL
CURRENT WAVEFORM
Figure 2b. Human Body Current Waveform
External OVLO Adjustment Functionality
If OVLO is connected to ground, the internal OVLO com-
parator uses the internally set OVLO value.
If an external resistor-divider is connected to OVLO and
V_OVLO exceeds the OVLO select voltage (V_{OVLO_SELECT),}
the internal OVLO comparator reads the IN fraction fixed
by the external resistor-divider.
R1 = 1MI is a good starting value for minimum current
consumption. Since V_{IN_OVLO}, V_{OVLO_THRESH}, and
R1 are known, R2 can be calculated from the following
formula:
V_{IN_OVLO}
=
V_{OVLO_THRESH}
×
₁₊
R1
R2^
This external resistor-divider is completely independent
from the internal resistor-divider.
ESD Test Conditions
ESD performance depends on a number of conditions.
The devices are specified for Q15kV (HBM) typical ESD
resistance on IN when IN is bypassed to ground with a
1FF ceramic capacitor.
Human Body Model ESD Protection
Figure 2a shows the HBM and Figure 2b shows the
current waveform it generates when discharged into a
low-impedance state. This model consists of a 100pF
capacitor charged to the ESD voltage of interest, which is
then discharged into the device through a 1.5kI resistor.
Ordering Information/
Selector Guide
PART
PIN-PACKAGE
TOP
MARK
OVLO
(V)
MAX14586ETA+T 8 TDFN-EP*
BNJ
7
MAX14590ETA+T 8 TDFN-EP*
BNK
15
Note: All devices are specified over the -40°C to +85°C oper-
ating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
Chip Information
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
8 TDFN-EP
PACKAGE
CODE
T822+2
OUTLINE
NO.
21-0168
LAND
PATTERN NO.
90-0065
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