MAX4840EXT+T Maxim Integrated Products, MAX4840EXT+T Datasheet

IC CTLR OVP 5.8V SC70-6

MAX4840EXT+T

Manufacturer Part Number
MAX4840EXT+T
Description
IC CTLR OVP 5.8V SC70-6
Manufacturer
Maxim Integrated Products
Type
Overvoltage Protection Controllerr
Datasheet
1.MAX4840EXTT.pdf (11 pages)

Specifications of MAX4840EXT+T

Applications
Cell Phones, Digital Cameras, Media Players
Mounting Type
Surface Mount
Package / Case
SC-70-6, SC-88, SOT-363
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MAX4840EXT+T
MAX4840EXT+TTR
The MAX4838A/MAX4840A/MAX4842A are overvoltage-
protection ICs that protect low-voltage systems against
voltages of up to +28V. If the input voltage exceeds the
overvoltage trip level, the MAX4838A/MAX4840A/
MAX4842A turn off the low-cost external n-channel
FET(s) to prevent damage to the protected components.
An internal charge pump eliminates the need for external
capacitors and drives the FET gate for a simple,
robust solution.
The MAX4838A has a 7.4V overvoltage threshold, and
the MAX4840A has a 5.8V overvoltage threshold. The
MAX4842A has a 4.7V overvoltage threshold. The
MAX4838A/MAX4840A have an undervoltage-lockout
(UVLO) threshold of 3.25V, while the MAX4842A has a
UVLO of 2.5V. In addition to the single FET configura-
tion, the devices can be configured with back-to-back
external FETs to prevent currents from being back-dri-
ven into the adapter.
On power-up, the device waits for 50ms before driving
GATE high. FLAG is held low for an additional 50ms
after GATE goes high before deasserting. The
MAX4838A/MAX4840A/MAX4842A have an open-drain
FLAG output. The FLAG output asserts immediately to
an overvoltage fault.
Additional features include a ±15kV (HBM) ESD-pro-
tected input (when bypassed with a 1µF capacitor) and
a shutdown pin (EN) to turn off the device.
All devices are offered in a small 6-pin SC70 and 6-pin
1.5mm x 1.0mm µDFN packages and are specified
over the -40°C to +85°C extended temperature range.
19-3979; Rev 0; 2/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX4838A
MAX4840A
MAX4842A
PART
Cell Phones
Digital Still Cameras
PDAs and Palmtop Devices
MP3 Players
THRESHOLD
________________________________________________________________ Maxim Integrated Products
Overvoltage-Protection Controllers with
UVLO
3.25
3.25
2.50
(V)
General Description
LEVEL
TRIP
7.4
5.8
4.7
Selector Guide
OV
(V)
Applications
INPUT
Yes
Yes
Yes
EN
Open-Drain
Open-Drain
Open-Drain
OUTPUT
FLAG
♦ Overvoltage Protection Up to +28V
♦ Preset 7.4V, 5.8V, or 4.7V Overvoltage Trip Level
♦ Drives Low-Cost nMOS FET
♦ Internal 50ms Startup Delay
♦ Internal Charge Pump
♦ Undervoltage Lockout
♦ ±15kV ESD-Protected Input
♦ Voltage Fault FLAG Indicator
♦ 6-Pin SC70 and µDFN Packages
♦ Lead Free
Note: All devices specified for the -40°C to +85°C extended
temperature range.
*Future product—contact factory for availability.
+Denotes lead-free package.
Pin Configuration appears at end of data sheet.
MAX4838AEXT+T
MAX4838AELT+
MAX4840AEXT+T
MAX4840AELT+
MAX4842AEXT+T
MAX4842AELT+*
+1.2V TO +28V
INPUT
PART
1µF
Typical Operating Circuit
1
6
2
PIN-
PACKAGE
6 SC70
6 µDFN
6 SC70
6 µDFN
6 SC70
6 µDFN
GND
IN
EN
Ordering Information
MAX4838A
MAX4840A
MAX4842A
Status FLAG
GATE
FLAG
4
3
NOTE: EN AND PULLUP
RESISTOR
MARK
TOP
ACY
ACZ
ADA
KW
KU
KV
NMOS
Features
V
OUTPUT
IO
L611-1
L611-1
L611-1
CODE
X6S-1
X6S-1
X6S-1
PKG
1

Related parts for MAX4840EXT+T

Image
Part Number
Description
Manufacturer
Datasheet
Request R
MAX4840
Part Number:
MAX4840
Description:
Overvoltage Protection Controllers with Status FLAG
Manufacturer:
MAXIM [Maxim Integrated Products]
Datasheet:
MAX4840.pdf (10 pages)
MAX7528KCWP
Part Number:
MAX7528KCWP
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX7528KCWP.pdf (12 pages)
MAX3261CCJ
Part Number:
MAX3261CCJ
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3261CCJ.pdf (12 pages)
MAX3263CAG
Part Number:
MAX3263CAG
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3263CAG.pdf (12 pages)
MAX8809AETL+
Part Number:
MAX8809AETL+
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX8809AETL.pdf (50 pages)
MAX1535CETJ+T
Part Number:
MAX1535CETJ+T
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX1535CETJT.pdf (39 pages)
DS2741N+
Part Number:
DS2741N+
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
MAX13450EAUD+T
Part Number:
MAX13450EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX13451EAUD+T
Part Number:
MAX13451EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX17497BATE+
Part Number:
MAX17497BATE+
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
MAX17502FATB+T
Part Number:
MAX17502FATB+T
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
MAX1978EVKIT
Part Number:
MAX1978EVKIT
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products
MAX2606EUT+
Part Number:
MAX2606EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
MAX2608EUT+
Part Number:
MAX2608EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
MAX2831EVKIT+
Part Number:
MAX2831EVKIT+
Description:
EVALUATION KIT/2.4GHZ TO 2.5GHZ 802.11G/B RF TRANSCEIVER WITH INTEGRATED PA
Manufacturer:
Maxim Integrated Products

MAX4840EXT+T Summary of contents

Page 1

... MAX4842A 2.50 4.7 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ♦ Overvoltage Protection Up to +28V ♦ Preset 7.4V, 5.8V, or 4.7V Overvoltage Trip Level ♦ Drives Low-Cost nMOS FET ♦ ...

Page 2

Overvoltage-Protection Controllers with Status FLAG ABSOLUTE MAXIMUM RATINGS IN to GND ..............................................................-0.3V to +30V GATE to GND ........................................................-0.3V to +12V EN, FLAG to GND ....................................................-0.3V to +6V Continuous Power Dissipation (T = +70°C) A 6-Pin SC70 (derate 3.1mW/°C above +70°C) ...

Page 3

Overvoltage-Protection Controllers with ELECTRICAL CHARACTERISTICS (continued +5V (MAX4838A/MAX4840A +25°C.) (Note 1) PARAMETER SYMBOL TIMING Startup Delay FLAG Blanking Time GATE Turn-On Time GATE Turn-Off Time FLAG Assertion Delay Initial Overvoltage Fault Delay Disable Time Note ...

Page 4

Overvoltage-Protection Controllers with Status FLAG (V = +5V (MAX4838A/MAX4840A unless otherwise noted.) MAX4842A GATE VOLTAGE vs. INPUT VOLTAGE 12 9 MAX4842A INPUT VOLTAGE (V) MAX4838A/MAX4840A ...

Page 5

Overvoltage-Protection Controllers with PIN NAME Input both the power-supply input and the overvoltage sense input. Bypass IN to GND with 1µF capacitor or larger. 2 GND Ground Fault Indication Output, Open-Drain, Active Low. FLAG is ...

Page 6

Overvoltage-Protection Controllers with Status FLAG IN GND EN Figure 5. Functional Diagram Detailed Description The MAX4838A/MAX4840A/MAX4842A provide up to +28V overvoltage protection for low-voltage systems. When the input voltage exceeds the overvoltage trip level, the MAX4838A/MAX4840A/MAX4842A turn off a low-cost ...

Page 7

Overvoltage-Protection Controllers with STANDBY GATE = 0 FLAG = LOW V > UVLO IN TIMER STARTS V < UVLO IN COUNTING t = 50ms OVLO CHECK GATE = 0 FLAG = LOW V < OVLO IN STARTUP GATE DRIVEN HIGH ...

Page 8

Overvoltage-Protection Controllers with Status FLAG Table 1. MOSFET Suggestions CONFIGURATION/ PART PACKAGE Si5902DC Dual/1206-8 Si1426DH Single/SC70-6 FDC6305N Dual/SSOT-6 FDC6561AN Dual/ SSOT-6 FDG315N Single/SC70-6 Since January 1996, all equipment manufactured and/or sold in the European community has been required to meet ...

Page 9

Overvoltage-Protection Controllers with 50Ω to 100Ω 330Ω DISCHARGE CHARGE-CURRENT- RESISTANCE LIMIT RESISTOR HIGH STORAGE VOLTAGE 150pF CAPACITOR DC SOURCE Figure 10. IEC 61000-4-2 ESD Test Model Pin Configurations TOP VIEW + IN 1 MAX4838A ...

Page 10

Overvoltage-Protection Controllers with Status FLAG (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) Translation Table for Calendar Year Code TABLE 1 Calendar Year 2005 Legend: ...

Page 11

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2006 Maxim Integrated Products ...

Related keywords