MAX4845ELT+T Maxim Integrated Products, MAX4845ELT+T Datasheet - Page 8

• Manufacturer Part Number: MAX4845ELT+T
• Description: IC CTLR OVP 5.8V 6-UDFN
• Manufacturer: Maxim Integrated Products
• Type: Overvoltage Protection Controllerr

Specifications of MAX4845ELT+T

• Applications: Cell Phones, Digital Cameras, Media Players
• Mounting Type: Surface Mount
• Package / Case: 6-µDFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MAX4845ELT+T; MAX4845ELT+TTR

Overvoltage Protection Controllers with
Low Standby Current
Figure 6 shows the Human Body Model and Figure 7
shows the current waveform it generates when dis-
charged into a low impedance. This model consists
of a 100pF capacitor charged to the ESD voltage of
interest, which is then discharged into the device
through a 1.5kΩ resistor.
Since January 1996, all equipment manufactured
and/or sold in the European Union has been required to
meet the stringent IEC 1000-4-2 specification. The IEC
1000-4-2 standard covers ESD testing and perfor-
mance of finished equipment; it does not specifically
refer to integrated circuits. The MAX4843–MAX4846
Figure 6. Human Body ESD Test Model
Figure 7. Human Body Model Current Waveform
8
AMPERES
_______________________________________________________________________________________
VOLTAGE
SOURCE
HIGH-
I
DC
P
36.8%
100%
90%
10%
0
CHARGE-CURRENT-
0
LIMIT RESISTOR
t
RL
1MΩ
R
100pF
C
C s
CURRENT WAVEFORM
TIME
STORAGE
CAPACITOR
RESISTANCE
1.5kΩ
DISCHARGE
R
t
D
DL
Human Body Model
I r
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
IEC 1000-4-2
DEVICE
UNDER
TEST
help users design equipment that meets Level 3 of IEC
1000-4-2, without additional ESD-protection compo-
nents.
The main difference between tests done using the
Human Body Model and IEC 1000-4-2 is higher peak
current in IEC 1000-4-2. Because series resistance is
lower in the IEC 1000-4-2 ESD test model (Figure 8),
the ESD withstand voltage measured to this standard is
generally lower than that measured using the Human
Body Model. Figure 9 shows the current waveform for
the ±8kV IEC 1000-4-2 Level 4 ESD Contact Discharge
test. The Air-Gap test involves approaching the device
with a charger probe. The Contact Discharge method
connects the probe to the device before the probe is
energized.
Figure 8. IEC 1000-4-2 ESD Test Model
Figure 9. IEC 1000-4-2 ESD Generator Current Waveform
tr = 0.7ns to 1ns
VOLTAGE
SOURCE
HIGH-
DC
100%
CHARGE-CURRENT-
90%
10%
LIMIT RESISTOR
I
50MΩ TO 100MΩ
R
150pF
C
C s
30ns
STORAGE
CAPACITOR
RESISTANCE
DISCHARGE
330Ω
R
D
60ns
DEVICE
UNDER
TEST
t