MAX4893BETB+T Maxim Integrated Products, MAX4893BETB+T Datasheet

IC CTLR OVP CURR LIMIT 10-TDFN

MAX4893BETB+T

Manufacturer Part Number
MAX4893BETB+T
Description
IC CTLR OVP CURR LIMIT 10-TDFN
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX4893BETBT.pdf (13 pages)

Specifications of MAX4893BETB+T

Applications
*
Mounting Type
Surface Mount
Package / Case
10-TDFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX4881–MAX4884/MAX4893B overvoltage pro-
tection (OVP) controllers with built-in current-limited
switch, protect low-voltage systems against voltages of
up to 28V. When the input voltage exceeds the overvolt-
age trip level of 5.6V (MAX4881/MAX4883/MAX4893B) or
4.5V (MAX4882/MAX4884), the external n-channel MOS-
FET is turned off to prevent damage to the protected
components. An undervoltage/overvoltage flag indicator
(OV) notifies the processor that an undervoltage/overvolt-
age fault condition is present.
The MAX4881/MAX4882 feature an internal 1.1A
current-limited switch, while the MAX4883B/MAX4883C/
MAX4884B/MAX4884C include an internal 0.7A current-
limited switch. The MAX4893B includes a 0.9A current-
limited switch. When the load current is at the current
limit for longer than the blanking time, the switch of the
M A X 4 8 8 1 / M A X 4 8 8 2 / M A X 4 8 8 3 B / M A X 4 8 8 4 B /
MAX4893B latches off and does not turn back on until
EN, CB, or IN is cycled. A current-limit flag (FLAGI)
asserts to indicate a current fault condition.
The MAX4883C/MAX4884C limit the current to 0.7A
indefinitely until the thermal protection trips. An overcur-
rent flag output asserts to indicate a current fault condi-
tion after the blanking time has elapsed.
The MAX4881–MAX4884/MAX4893B have a control
input (CB) that is used to turn on and off the internal cur-
rent-limited switch. Other features include a shutdown
function (EN) to disable the external n-channel MOSFET,
and a built-in startup delay to allow the adapter voltage
to settle down before turning on the MOSFET.
The MAX4881–MAX4884/MAX4893B are offered in a
space-saving 10-pin TDFN package and operate over
the extended -40°C to +85°C temperature range.
19-3777; Rev 2; 10/06
Cell Phones
Digital Still Cameras
* EP = Exposed pad.
**Future product—contact factory for availability.
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.
MAX4881ETB
MAX4882ETB
MAX4883BETB
MAX4883CETB
MAX4884BETB**
MAX4884CETB**
MAX4893BETB
PART
________________________________________________________________ Maxim Integrated Products
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Overvoltage Protection Controllers with
TEMP RANGE
General Description
PDAs and Palmtop Devices
MP3 Players
Applications
10 TDFN-EP*
10 TDFN-EP*
10 TDFN-EP*
10 TDFN-EP*
10 TDFN-EP*
10 TDFN-EP*
10 TDFN-EP*
PIN-PACKAGE
LEVEL (V)
OV TRIP
5.6
4.5
5.6
5.6
4.5
4.5
5.6
o Overvoltage Protection Up to 28V
o Preset Overvoltage Trip Level
o Internal Current-Limited Switch
o Drives Low-Cost n-Channel MOSFET
o Internal 50ms Startup Delay
o Overvoltage Fault OV Indicator
o Current-Limit Fault FLAGI Indicator
o Undervoltage Lockout
o Thermal Shutdown Protection
o Tiny 10-Pin TDFN Package
Current Limit in TDFN
TOP VIEW
CURRENT
5.6V (MAX4881/MAX4883/MAX4893B)
4.5V (MAX4882/MAX4884)
1.1A (MAX4881/MAX4882)
0.7A (MAX4883/MAX4884)
0.9A (MAX4893B)
*CONNECT EXPOSED PAD TO GND.
LIMIT (A)
1.1
1.1
0.7
0.7
0.7
0.7
0.9
CURRENT-LIMIT
CONTINUOUS
CONTINUOUS
LATCHOFF
LATCHOFF
LATCHOFF
LATCHOFF
LATCHOFF
10
+
1
*EP
3mm x 3mm TDFN
MODE
Ordering Information
9
2
MAX4893B
MAX4881
MAX4882
MAX4883
MAX4884
Pin Configuration
8
3
7
4
MARK
6
5
TOP
APM
APO
APK
APN
APL
APP
ATF
Features
T1033-1
T1033-1
T1033-1
T1033-1
T1033-1
T1033-1
T1033-1
CODE
PKG
1

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MAX4893BETB+T Summary of contents

Page 1

... MAX4893BETB -40°C to +85° Exposed pad. **Future product—contact factory for availability. ________________________________________________________________ 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. Current Limit in TDFN o Overvoltage Protection Up to 28V o Preset Overvoltage Trip Level 5 ...

Page 2

Overvoltage Protection Controllers with Current Limit in TDFN ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) IN ............................................................................-0.3V to +30V GATE ......................................................................-0.3V to +12V EN, , OV, FLAGI, BTA, BTB ................................-0.3V to +6V CB Continuous Power Dissipation (T = +70°C) ...

Page 3

Overvoltage Protection Controllers with ELECTRICAL CHARACTERISTICS (continued +5V (MAX4881/MAX4883/MAX4893B values are +25°C.) (Note 1) A PARAMETER SYMBOL GATE GATE Voltage GATE Pulldown Current TIMING Startup Delay OV Blanking Time t OV-BLANK GATE Turn-On ...

Page 4

Overvoltage Protection Controllers with Current Limit in TDFN ( +25°C, unless otherwise noted CURRENT vs. INPUT VOLTAGE IN BTA 400 350 300 OVLO ...

Page 5

Overvoltage Protection Controllers with ( +25°C, unless otherwise noted CURRENT LIMIT vs. TEMPERATURE (MAX4884) 800 700 600 500 400 300 200 2.7V BTB 100 ...

Page 6

Overvoltage Protection Controllers with Current Limit in TDFN PIN NAME Input the power input for the OVP charge pump. Bypass IN to GND with a 1µF or larger 1 IN capacitor. Active-Low Enable Input. Drive EN high to ...

Page 7

Overvoltage Protection Controllers with V V UVLO IN 1.2V t GON t START V GATE 0. Figure 1. Startup Timing Diagram 7V/ OVLO 4V/5V t GOFF V GATE 0. Figure 2. Shutdown Timing ...

Page 8

Overvoltage Protection Controllers with Current Limit in TDFN t t BLANK BLANK LOAD CURRENT ON SWITCH STATUS FLAGI (a) MAX4881/MAX4882/MAX4883B/MAX4884B/MAX4893B t t BLANK BLANK LOAD CURRENT ON SWITCH STATUS FLAGI (b) MAX4883C/MAX4884C Figure 5. Current-Limit Fault Timing Overcurrent Flag Output ...

Page 9

Overvoltage Protection Controllers with EN IN OVLO CHARGE PUMP IN UVLO OV 1.1A/0.7A LIMIT I FLAGI REF CHARGE PUMP BLANKING TIME AND LATCHOFF LOGIC MAX4881/MAX4882 MAX4883B/MAX4884B GND Figure 7a. MAX4881/MAX4882/MAX4883B/MAX4884B/ MAX4893B Functional Diagram resets if the overcurrent condition disappears before ...

Page 10

Overvoltage Protection Controllers with Current Limit in TDFN Table 1. MOSFET Suggestions CONFIGURATION/ PART PACKAGE Single/SC70-6 Si1426DH FDG315N Single/SC70 1MΩ 1.5kΩ DISCHARGE CHARGE-CURRENT- RESISTANCE LIMIT RESISTOR HIGH STORAGE VOLTAGE 100pF CAPACITOR DC SOURCE Figure ...

Page 11

Overvoltage Protection Controllers with 4.4V ADAPTER WITH BUILT-IN CHARGER IN GATE BTA V IO 1.1A/0.7A BTB MAX4882/ MAX4884 FLAGI GND Figure 12. Connection to an AC-DC Adapter without a Built-In Battery Charger ground-connected pad as the only ...

Page 12

Overvoltage Protection Controllers with Current Limit in TDFN (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.) 12 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, 6,8,10 & 14L, ...

Page 13

... 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 ____________________ 13 © 2006 Maxim Integrated Products ...

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