MAX4845ELT+T Maxim Integrated Products, MAX4845ELT+T Datasheet

IC CTLR OVP 5.8V 6-UDFN

MAX4845ELT+T

Manufacturer Part Number
MAX4845ELT+T
Description
IC CTLR OVP 5.8V 6-UDFN
Manufacturer
Maxim Integrated Products
Type
Overvoltage Protection Controllerr
Datasheet
1.MAX4845ELTT.pdf (10 pages)

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
The MAX4843–MAX4846 overvoltage protection con-
trollers protect low-voltage systems against high-voltage
faults of up to 28V. When the input voltage exceeds the
overvoltage threshold, these devices turn off a low-cost,
external n-channel FET(s) to prevent damage to the pro-
tected components. An internal charge pump eliminates
the need for external capacitors and drives the FET gate
for a simple, robust solution.
The overvoltage trip level is set to 7.4V (MAX4843),
6.35V (MAX4844), 5.8V (MAX4845), or 4.65V
(MAX4846). When the input voltage drops below the
undervoltage lockout (UVLO) threshold, the devices
enter a low standby current mode (10µA). The
MAX4843/MAX4844/MAX4845 have a UVLO threshold
of 4.15V, the MAX4845C/MAX4845D have a UVLO
threshold of 2.2V, and the MAX4846 has a UVLO
threshold of 2.5V. In addition to the single FET configu-
ration, the devices can be configured with back-to-
back external FETs to prevent currents from being
back-driven into the adapter.
An additional feature includes a ±15kV ESD-protected
input when bypassed with a 1µF capacitor to ground.
All devices are offered in small 6-pin µDFN (1.5mm x
1.0mm) and 6-pin ultra-thin LGA (MAX4845 and
MAX4846 only) (1.5mm x 1.0mm) packages and are
specified for operation over the -40°C to +85°C temper-
ature range.
19-3649; Rev 5; 12/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
INPUT
+1.2V TO +28V
Cell Phones
Digital Still Cameras
PDAs and Palmtop Devices
MP3 Players
1μF
Typical Operating Circuit
2
1
________________________________________________________________ Maxim Integrated Products
GND
IN
Overvoltage Protection Controllers with
MAX4843–
MAX4846
General Description
GATE
FLAG
4
3
V
Applications
IO
N
OUTPUT
♦ Overvoltage Protection Up to 28V
♦ Preset 7.4V, 6.35V, 5.8V, or 4.65V Overvoltage Trip
♦ Low (10µA) Undervoltage Lockout Standby
♦ Drives Low-Cost nMOSFET
♦ Internal 50ms Startup Delay
♦ Internal Charge Pump
♦ Overvoltage Fault FLAG Indicator
♦ 6-Pin (1.5mm x 1.0mm) µDFN Package
Note: All devices are specified over the -40°C to +85°C tem-
perature range.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
†OVLO maximum is 6.0V for the MAX4845C and 5.9V for the
MAX4845D.
MAX4843ELT
MAX4844ELT
MAX4845ELT
MAX4845EYT+T
MAX4845CEYT+T
MAX4845DEYT+T
MAX4846ELT
MAX4846EYT+T
Level
Current
TOP VIEW
Low Standby Current
PART
N.C.
IN
6
1
MAX4843–
MAX4846
μDFN
N.C.
GND
5
2
PIN-
PACKAGE
6 μDFN
6 μDFN
6 μDFN
6 UTLGA
6 UTLGA
6 UTLGA
6 μDFN
6 UTLGA
GATE
FLAG
4
3
Ordering Information
Pin Configurations
UVLO
ULTRA-THIN LGA
N.C.
4.15
4.15
4.15
4.15
2.20
2.20
2.50
2.50
IN
6
1
(V)
MAX4845
MAX4846
GND
N.C.
5
2
OVLO
5.80†
5.80†
7.40
6.35
5.80
5.80
4.65
4.65
Features
(V)
GATE
FLAG
4
3
MARK
TOP
BG
AQ
AC
BH
AD
BE
BF
AP
1

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MAX4845ELT+T Summary of contents

Page 1

... MAX4843– MAX4846 2 3 GND FLAG ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Low Standby Current ♦ Overvoltage Protection Up to 28V ♦ Preset 7.4V, 6.35V, 5.8V, or 4.65V Overvoltage Trip Level ♦ ...

Page 2

Overvoltage Protection Controllers with Low Standby Current ABSOLUTE MAXIMUM RATINGS IN to GND ..............................................................-0.3V to +30V GATE to GND ........................................................-0.3V to +12V FLAG to GND ..........................................................-0.3V to +6V Continuous Power Dissipation (T = +70°C) A 6-Pin µDFN (derate 2.1mW/°C above ...

Page 3

Overvoltage Protection Controllers with ELECTRICAL CHARACTERISTICS (continued +5V for MAX4843/MAX4844/MAX4845 noted. Typical values are +25°C.) (Note 1) A PARAMETER SYMBOL TIMING Startup Delay t START FLAG Blanking Time t BLANK Gate Turn-On Time ...

Page 4

Overvoltage Protection Controllers with Low Standby Current (V = +5V for MAX4843/MAX4844/MAX4845 GATE VOLTAGE vs. INPUT VOLTAGE (MAX4846 INPUT VOLTAGE (V) POWER-UP RESPONSE MAX4843-46 toc07 V ...

Page 5

Overvoltage Protection Controllers with IN REGULATOR GND UVLO t GON t START V GATE 0.3V V FLAG Figure 1. Startup Timing Diagram OVLO 0V t OVP 80% I GATE Figure 3. Power-Up Overvoltage Timing ...

Page 6

Overvoltage Protection Controllers with Low Standby Current Detailed Description The MAX4843–MAX4846 provide up to 28V overvoltage protection for low-voltage systems. When the input volt- age exceeds the overvoltage trip level, the MAX4843–MAX4846 turn off a low-cost external n-chan- nel FET(s) ...

Page 7

Overvoltage Protection Controllers with Applications Information MOSFET Configuration The MAX4843–MAX4846 can be used with either a sin- gle MOSFET configuration as shown in the Typical Operating Circuit , or can be configured with a back-to- back MOSFET as shown in ...

Page 8

Overvoltage Protection Controllers with Low Standby Current Human Body Model 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 ...

Page 9

Overvoltage Protection Switches with Chip Information PROCESS: BiCMOS _______________________________________________________________________________________ Low Standby Current Package Information For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE 6 µDFN L611-1 6 UTLGA Y61A1-1 DOCUMENT NO. 21-0147 21-0190 ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products ...

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