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MAX4827ELT+T

P1-P3P4-P6P7-P9P10-P11
General Description
The MAX4826–MAX4831 family of switches has internal
current limiting to prevent host devices from being
damaged due to faulty load conditions. These analog
switches have a low 0.7Ω on-resistance and operate
from a +2.3V to +5.5V input voltage range. These
devices are available with guaranteed 50mA and
100mA current limits, making them ideal for load-
switching applications. In addition to the current-limit
fault flag (FFLG), an open-drain no-load flag indicator
(NOLD) notifies the system when the current through
the switch is less than 10mA (MAX4826–MAX4829), or
5mA (MAX4830/MAX4831).
When the switch is on and a load is connected to the
port, a guaranteed blanking time of 14ms ensures that
the transient voltages settle down. If, after this blanking
time, the load current is greater than the current limit,
the MAX4826/MAX4828/MAX4830 enter a latchoff state
where the switch is turned off, and FFLG is issued to
the microprocessor. The switch can be turned on again
by cycling the power or ON.
The MAX4827/MAX4829/MAX4831 have an autoretry
feature where the switch turns off after the blanking
time, and then continuously checks to see if the over-
load condition is present. The current-limit fault flag
(FFLG) is issued and remains low until after the fault
condition is removed. The switch remains on after the
overload condition disappears.
The MAX4826–MAX4831 operate over the extended
-40°C to +85°C temperature range, and are available in a
tiny space-saving, 1mm x 1.5mm, 6-pin µDFN package.
Features
♦ Guaranteed Current Limit: 50mA, 100mA
♦ Thermal Shutdown Protection
♦ Reverse-Current Protection
♦ 0.7Ω On-Resistance (MAX4826–MAX4831)
♦ 14ms Guaranteed Blanking Time
♦ Fault Flag (FFLG)
♦ No-Load Flag (NOLD)
♦ 65µA Supply Current
♦ 8µA Latchoff Current
♦ 0.01µA Shutdown Current
♦ +2.3V to +5.5V Supply Range
♦ Undervoltage Lockout
♦ Fast Current-Limit Response Time
♦ 6-Pin µDFN Package (1mm x 1.5mm)
Applications
GPS Systems
Cell Phones
Digital Still Cameras
PDAs and Palmtop Devices
MP3 Players
MAX4826–MAX4831
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
________________________________________________________________
Maxim Integrated Products
1
Ordering Information/Selector Guide
19-3672; Rev 1; 8/09
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.
PART PIN-PACKAGE
MIN FULL-LOAD
LIMIT
(mA)
MAX NO-LOAD
LIMIT
(mA)
ON-RESISTANCE
()
T
A
= +25°C
MODE
TOP
MARK
MAX4826ELT+T 6 μDFN 50 10 1 Latchoff AK
MAX4827ELT+T* 6 μDFN 50 10 1 Autoretry AL
MAX4828ELT+T* 6 μDFN 100 10 1 Latchoff AM
MAX4829ELT+T 6 μDFN 100 10 1 Autoretry AN
MAX4830ELT+T 6 μDFN 50 5 2 Latchoff AO
MAX4830ELT/V+T 6 μDFN 50 5 2 Latchoff OX
MAX4831ELT+T* 6 μDFN 50 5 2 Autoretry AP
Note: All devices operate over the -40°C to +85°C operating range.
T = Tape and reel.
*Future product—contact factory for availability.
/V denotes an automotive qualified part.
Pin Configuration appears at end of data sheet.
MAX4826–MAX4831
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN, ON, FFLG, NOLD, OUT to GND .........................-0.3V to +6V
OUT Short Circuit to GND .................................Internally Limited
Continuous Power Dissipation (T
A
= +70°C)
6-Pin µDFN (derate 2.1mW/°C above +70°C) .............168mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
IN
= +2.3V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
IN
= +3.3V, T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage V
IN
2.3 5.5 V
V
IN
= +2.3V to +5.0V 65 100
Quiescent Current I
Q
V
ON
= V
IN
, I
OUT
=
0, switch on
V
IN
= +5.0V to +5.5V 120
µA
Latchoff Current (Note 2) I
LATCH
V
ON
= V
IN
= 3.3V, after an overcurrent fault
(MAX4826/MAX4828/MAX4830)
815µA
Shutdown Current I
SHDN
V
ON
= 0, I
OUT
= 0mA 0.01 1 µA
Shutdown Reverse Leakage I
SHDNRV
V
ON
= 0, V
IN
= +2.3V, V
OUT
= +5.5V 0.01 1 µA
(MAX4826/MAX4827/MAX4830/MAX4831)
R
L
= 10Ω
50 120
Forward-Current Limit I
FWD
(MAX4828/MAX4829) R
L
= 5Ω 100 240
mA
V
OUT
- V
IN
< 0.5V
(MAX4826/MAX4827/MAX4830/MAX4831)
120
Reverse-Current Limit I
REV
V
OUT
- V
IN
< 0.5V (MAX4828/MAX4829) 240
mA
MAX4826–MAX4829 1.0 10.0
No-Load Threshold I
NLTH
MAX4830/MAX4831 0.5 5.0
mA
ON Input Leakage I
ONLK
V
ON
= V
IN
or GND -1 +1 µA
Off-Switch Leakage I
SWLK
V
IN
= +5.5V, V
ON
= 0, V
OUT
= 0 0.01 1 µA
Undervoltage Lockout UVLO Rising edge 1.8 2.2 V
Undervoltage Lockout Hysteresis UVLO
HYS
100 mV
(MAX4826–MAX4829) 0.7 1.0
T
A
= +25°C, I
OUT
= 20mA
(MAX4830/MAX4831) 1.4 2.0
(MAX4826–MAX4829) 1.3
On-Resistance R
ON
T
A
= -40°C to
+85°C,
I
OUT
= 20mA
(MAX4830/MAX4831) 2.6
Ω
ON Input-Logic-High Voltage V
IH
2.0 V
ON Input-Logic-Low Voltage V
IL
0.8 V
FFLG, NOLD Output-Logic-Low
Voltage
I
SINK
= 1mA 0.4 V
MAX4826–MAX4831
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +2.3V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
IN
= +3.3V, T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
FFLG, NOLD Output-High
Leakage Current
V
IN
= V
FFLG
= V
NOLD
= +5.5V 1 µA
Thermal Shutdown +150 °C
Thermal-Shutdown Hysterisis 15 °C
DYNAMIC
Turn-On Time
ON from low to high; I
OUT
= 10mA,
C
L
= 0.1µF (Note 3)
50 µs
Turn-Off Time
ON from high to low; I
OUT
=10mA,
C
L
= 0.1µF (Note 3)
30 ns
Blanking Time t
BLANK
Overcurrent fault 14 60 ms
Short-Circuit Current-Limit
Response Time
V
ON
= V
IN
= +3.3V, short circuit applied to
OUT
5µs
No-Load-Detection Response
Time
I
OUT
falling step signal from 15mA to 0mA,
C
L
= 0.1µF
60 µs
Retry Time t
RETRY
Overcurrent fault (Figure 2) (Note 4) 196 840 ms
Note 1: All parts are 100% tested at T
A
= +25°C. Limits at T
A
= -40°C to +85°C are guaranteed by design.
Note 2: Latchoff current does not include the current flowing into FFLG and NOLD.
Note 3: Turn-on time is defined as the time taken for the current through the switch to go from 0mA to full load. Turn-off time is
defined as the time taken for the current through the switch to go from full load to 0mA.
Note 4: Retry time is typically 14x the blanking time.
Typical Operating Characteristics
(V
IN
= +3.3V, T
A
= +25°C, unless otherwise noted.)
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4826 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (μA)
5.14.73.9 4.33.1 3.52.7
10
20
30
40
50
60
70
80
90
0
2.3 5.5
V
ON
= V
IN
V
IN
= +2.3V TO +5.5V
TEMPERATURE (°C)
60
3510-15-40 85
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX4826 toc02
SUPPLY CURRENT (μA)
10
20
30
40
50
60
70
80
90
0
V
ON
= V
IN
V
IN
= 5V
V
IN
= 3.3V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
TEMPERATURE (°C)
603510-15-40 85
LATCHOFF CURRENT
vs. TEMPERATURE
MAX4826 toc03
LATCHOFF CURRENT (μA)
V
IN
= 5V
V
IN
= 3.3V
V
ON
= V
IN
P1-P3P4-P6P7-P9P10-P11

MAX4827ELT+T

Mfr. #:
Buy MAX4827ELT+T
Manufacturer:
Maxim Integrated
Description:
IC SWITCH 1X1 6UTDFN
Lifecycle:
New from this manufacturer.
Delivery:
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