MAX4792EUS [MAXIM]
200mA/250mA/300mA Current-Limit Switches; 200毫安/ 250毫安/ 300毫安限流开关
| 型号： | MAX4792EUS |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 200mA/250mA/300mA Current-Limit Switches |
| 文件： | 总12页 (文件大小：326K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-2663; Rev 2; 2/05
200mA/250mA/300mA Current-Limit Switches
General Description
Features
♦ Guaranteed Current Limit: 200mA, 250mA, 300mA
♦ Thermal-Shutdown Protection
The MAX4789–MAX4794 family of switches feature
internal current limiting to prevent damage to host
devices due to faulty load conditions. These analog
switches have a low 0.2Ω on-resistance and operate
from 2.3V to 5.5V input voltage range. They are avail-
able with guaranteed 200mA, 250mA, and 300mA cur-
rent limits, making them ideal for SDIO and other load
switching applications.
♦ Reverse Current Protection
♦ 0.2Ω On-Resistance
♦ 14ms Guaranteed Blanking Time
♦ FLAG Function (MAX4789/MAX4791/MAX4793)
♦ 80µA Supply Current
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 MAX4789, MAX4791, and MAX4793 enter a latch-
off state where the switch is turned off and FLAG is
issued to the microprocessor. The switch can be turned
on again by cycling the power or the ON pin.
♦ 8µA Latch-Off Current
(MAX4789/MAX4791/MAX4793)
♦ 0.01µA Shutdown Current
♦ 2.3V to 5.5V Supply Range
♦ Undervoltage Lockout
♦ Fast Current-Limit Response Time (5µs)
♦ TDFN and SOT23/SOT143 Packages
The MAX4790, MAX4792, and MAX4794 have an
autoretry feature where the switch turns off after the
blanking time and then continuously checks to see if
the overload condition is present. The switch remains
on after the overload condition disappears.
Ordering Information
TOP
MARK
The MAX4789–MAX4794 are available in 6-pin 3mm x
3mm TDFN and tiny space-saving 4-pin SOT143 pack-
ages. The MAX4789/MAX4791/MAX4793 are also avail-
able in a tiny 5-pin SOT23 package. For lower current
current-limiting switches, refer to the MAX4785–MAX4788
data sheet.
PART
TEMP RANGE PIN-PACKAGE
MAX4789EUS-T -40°C to +85°C 4 SOT143-4
KAFE
AEAC
ABO
MAX4789EUK-T -40°C to +85°C 5 SOT23-5
MAX4789ETT
-40°C to +85°C 6 TDFN-EP*
MAX4790EUS-T -40°C to +85°C 4 SOT143-4
KAFF
ABP
MAX4790ETT
-40°C to +85°C 6 TDFN-EP
Applications
*EP = Exposed pad.
PDAs and Palmtop Devices
Cell Phones
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
GPS Systems
Hand-Held Devices
SDIO
Typical Operating Circuit
2.3V TO 5.5V
Pin Configurations
TOP VIEW
IN
IN 1
5
4
OUT
OUT
1
4
3
IN
ON
µP
FLAG
OUT
MAX4789
MAX4791
MAX4793
MAX4789
MAX4791
MAX4793
MAX4789–
MAX4794
2
GND
ON 3
FLAG
GND 2
ON
TO SDIO PORT
GND
SOT23
SOT143
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
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.
200mA/250mA/300mA Current-Limit Switches
ABSOLUTE MAXIMUM RATINGS
IN, ON, FLAG, OUT to GND.....................................-0.3V to +6V
OUT Short Circuit to GND.................................Internally Limited
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
Continuous Power Dissipation (T = +70°C)
A
4-Pin SOT143 (derate 4.0mW/°C above +70°C)..........320mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
6-Pin TDFN (derate 24.4mW/°C above +70°C).........1951.2mW
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.
ELECTRICAL CHARACTERISTICS
(V = 2.3V to 5.5V, T = -40°C to +85°C, unless otherwise noted. Typical values are at V = 3.3V, T = +25°C.) (Note 1)
IN
A
IN
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
5.5
UNITS
Operating Voltage
V
2.3
V
IN
V
V
= +2.3V to +5.0V
= +5.0V to +5.5V
80
120
160
IN
IN
V
= V , I
= 0,
ON
IN OUT
Quiescent Current
I
µA
Q
switch on
V
= V , after an overcurrent fault
IN
ON
Latch-Off Current (Note 2)
Shutdown Current
I
8
15
µA
µA
LATCH
(MAX4789/MAX4791/MAX4793)
I
V
= 0V
0.01
1
SHDN
ON
MAX4789/MAX4790
MAX4791/MAX4792
MAX4793/MAX4794
MAX4789/MAX4790
MAX4791/MAX4792
MAX4793/MAX4794
200
250
300
300
375
450
300
375
450
+1
Forward Current Limit
Reverse Current Limit
mA
mA
ON Input Leakage
V
V
= V or GND
-1
µA
µA
V
ON
ON
IN
Off Switch Leakage
= 0V, V
= 0V
0.01
1
OUT
Undervoltage Lockout
Undervoltage Lockout Hysteresis
UVLO
Rising edge
1.8
2.2
100
0.2
mV
T
T
= +25°C, I
= 100mA
0.4
0.5
A
OUT
On-Resistance
R
Ω
ON
= -40°C to +85°C, I
= 100mA
A
OUT
ON Input Logic High Voltage
ON Input Logic Low Voltage
FLAG Output Logic Low Voltage
V
2.0
V
V
V
IH
V
0.8
0.4
IL
I
= 1mA (MAX4789/MAX4791/MAX4793)
SINK
FLAG Output High Leakage
Current
V
= V
= 5.5V
FLAG
IN
1
µA
(MAX4789/MAX4791/MAX4793)
Thermal Shutdown
Thermal-Shutdown Hysteresis
DYNAMIC
150
15
°C
°C
V
from low to high; I
= 10mA,
= 10mA,
ON
OUT
Turn-On Time (Note 3)
Turn-Off Time (Note 3)
100
40
µs
ns
C = 0.1µF
L
V
from high to low; I
ON
OUT
C = 0.1µF
L
2
_______________________________________________________________________________________
200mA/250mA/300mA Current-Limit Switches
ELECTRICAL CHARACTERISTICS (continued)
(V = 2.3V to 5.5V, T = -40°C to +85°C, unless otherwise noted. Typical values are at V = 3.3V, T = +25°C.) (Note 1)
IN
A
IN
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Blanking Time
t
Overcurrent fault (Figures 2, 3)
14
60
ms
BLANK
Short-Circuit Current-Limit
Response Time
V
OUT
= V = 3.3V, short circuit applied to
ON IN
5
µs
Retry Time (Note 4)
t
MAX4790/MAX4792/MAX4794 (Figure 2)
98
420
ms
RETRY
Note 1: All parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and correlation.
Note 2: Latch-off current does not include the current flowing into FLAG.
Note 3: The on time is defined as the time taken for the current through the switch to go from 0mA to full load. The 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 7 times the blanking time.
Typical Operating Characteristics
(V = 3.3V, T = +25°C, unless otherwise noted.)
IN
A
SUPPLY CURRENT
vs. TEMPERATURE
LATCH-OFF CURRENT
vs. TEMPERATURE
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
15
14
13
12
11
10
9
120
100
80
60
40
20
0
100
90
80
70
60
50
40
30
20
10
0
V
= V
IN
V
ON
= V
IN
V
= V
IN
ON
ON
V
IN
= 5V
V
V
= 5V
IN
V
IN
= 3.3V
8
7
= 3.3V
6
5
4
3
2
1
0
IN
-40
-15
10
35
60
85
-40
-15
10
35
60
85
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
SHUTDOWN LEAKAGE CURRENT
vs. TEMPERATURE
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
LATCH-OFF LEAKAGE CURRENT
vs. TEMPERATURE
10
1
100
100
V
= 5V
IN
10
1
10
1
V
CC
= 5V
V
= 3.3V
0.1
0.01
IN
V
IN
= 5V
0.1
V
IN
= 3.3V
0.1
0.01
V
CC
= 3.3V
0.01
0.001
0.001
0.0001
0.001
0.0001
-40
85
-15
10
35
60
-15
10
35
60
-40
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
3
200mA/250mA/300mA Current-Limit Switches
Typical Operating Characteristics (continued)
(V = 3.3V, T = +25°C, unless otherwise noted.)
IN
A
NORMALIZED ON-RESISTANCE
vs. TEMPERATURE
OUTPUT CURRENT
vs. OUTPUT VOLTAGE
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
500
450
400
350
300
250
200
150
100
50
MAX4793/MAX4794
V
= 5V
CC
MAX4789/MAX4790
MAX4791/MAX4792
0
-40
-15
10
35
60
85
0
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3
TEMPERATURE (°C)
V
IN
- V
OUT
(V)
FLAG-BLANKING TIMEOUT
vs. TEMPERATURE
SWITCH TURN-ON/OFF TIMES
vs. TEMPERATURE
50
45
40
35
30
25
20
1000
100
10
ON
V = 5V
CC
V
= 3.3V
CC
1
0.1
OFF
0.01
0.001
I
= 10mA
LOAD
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
CURRENT-LIMIT RESPONSE
CURRENT-LIMIT RESPONSE
MAX4789 toc11
MAX4789 toc12
V
C
= 3.3V
= 1µF
C
OUT
= 1µF
IN
IN
V
IN
V
= V
ON
IN
2V/div
1V/div
V
ON
2V/div
I
I
OUT
OUT
V
C
C
= V
ON
= 1µF
IN
IN
100mA/div
100mA/div
= 1µF
OUT
40µs/div
20µs/div
4
_______________________________________________________________________________________
200mA/250mA/300mA Current-Limit Switches
Typical Operating Characteristics (continued)
(V = 3.3V, T = +25°C, unless otherwise noted.)
IN
A
CURRENT-LIMIT RESPONSE
(OUT SHORTED TO GND)
SWITCH TURN-ON TIME RESPONSE
MAX4789 toc13
MAX4789 toc14
C
C
= 1µF
OUT
IN
= 1µF
V
IN
V
ON
2V/div
1V/div
V
OUT
2V/div
I
OUT
10mA/div
I
OUT
5A/div
40µs/div
100µs/div
FLAG-BLANKING RESPONSE
SWITCH TURN-OFF TIME RESPONSE
MAX4789 toc16
MAX4789 toc15
V
IN
2V/div
V
ON
V
ON
2V/div
2V/div
FLAG
2V/div
I
OUT
10mA/div
I
OUT
100mA/div
4ms/div
200ns/div
Pin Description
PIN
TDFN 5-SOT23
MAX4789 MAX4790 MAX4789
MAX4791 MAX4792 MAX4791
MAX4793 MAX4794 MAX4793
TDFN
4-SOT143
MAX4789–
MAX4794
NAME
FUNCTION
Fault Output. This open-drain output goes low when the device stays in
1
—
4
—
FLAG forward or reverse current limit for more than the blanking time period.
FLAG is high impedance when a fault is not present or when ON is low.
GND Ground
2
3
4
5
6
2
3
2
3
2
3
ON
N.C.
IN
Active-High Switch On Input. A logic high turns the switch on.
No Connection. Not internally connected.
1, 4
5
—
1
—
4
Input. Bypass with a 0.1µF ceramic capacitor to ground.
Switch Output. Bypass with a 0.1µF ceramic capacitor to ground.
6
5
1
OUT
_______________________________________________________________________________________
5
200mA/250mA/300mA Current-Limit Switches
REVERSE CURRENT
MAX4789/MAX4791/
DETECTOR
MAX4793 ONLY
FLAG
BLANKING TIME
CIRCUITRY
N
FORWARD CURRENT
DETECTOR
N
OUT
IN
+2.0V
UNDERVOLTAGE
LOCKOUT
ON
LOGIC
AUTO-
RETRY
MAX4789–MAX4794
GND
Figure 1. Functional Diagram
Reverse Current Protection
The MAX4789–MAX4794 limit the reverse current (V
Detailed Description
OUT
value. The
The MAX4789–MAX4794 are forward/reverse current-
limited switches that operate from a 2.3V to 5.5V input
voltage range and guarantee a 200mA, 250mA, and
300mA minimum current-limit threshold for different
options. The voltage drop across an internal sense
resistor is compared to two reference voltages to indi-
cate a forward or reverse current-limit fault. When the
load current exceeds the preset current limit for greater
than the fault-blanking time, the switch opens.
to V ) from exceeding the maximum I
IN
REV
switch is shut off and FLAG is asserted (MAX4789/
MAX4791/MAX4793) if the reverse current-limit condition
persists for more than the blanking time. This feature pre-
vents excessive reverse currents from flowing through the
device.
Switch-On/Off Control
Toggle ON high to enable the current-limited switches.
The switches are continuously on, only if V exceeds the
IN
The MAX4790, MAX4792, and MAX4794 have an
autoretry function that turns on the switch again after an
internal retry time expires. If the faulty load condition is
still present after the blanking time, the switch turns off
again and the cycle is repeated. If the faulty load con-
dition is not present, the switch remains on.
UVLO threshold (typically 2V) and there is no fault. When
a forward/reverse current fault is present or the die
exceeds the thermal-shutdown temperature of +150°C,
OUT is internally disconnected from IN and the supply
current decreases to 8µA (latch off). The switch is now
operating in one of its off states. The switch-off state also
occurs when driving ON low, thus reducing the supply
current (shutdown) to 0.01µA. Table 1 illustrates the
ON/OFF state of the MAX4789–MAX4794 current-limit
switches.
The MAX4789, MAX4791, and MAX4793 do not have
the autoretry option and the switch remains in latch-off
mode until the ON pin or the input power is cycled from
high to low and then high again.
The undervoltage lockout (UVLO) circuit prevents erro-
neous switch operation when the input voltage goes too
low during startup conditions.
FLAG Indicator
The MAX4789, MAX4791, and MAX4793 feature a
latched fault output, FLAG. Whenever a fault is activat-
ed, it latches FLAG output low and also turns the switch
6
_______________________________________________________________________________________
200mA/250mA/300mA Current-Limit Switches
Table 1. MAX4789–MAX4794 Switch Truth Table
ON
Low
High
High
FAULT
SWITCH ON/OFF
SUPPLY CURRENT MODE
Shutdown
X
OFF
Undervoltage Lockout OFF
Shutdown
Thermal
OFF immediately (t
period does not apply)
Latch off
BLANK
OFF after t
period has elapsed
Latch off
BLANK
ON during t
period, OFF during t
period for the
BLANK
RETRY
High
Current Limit
MAX4790, MAX4792, and MAX4794; cycle repeats until fault
is removed
See the Autoretry section
off. FLAG is an open-drain output transistor and requires
an external pullup resistor from FLAG to IN. During shut-
down (ON is low), the pulldown on FLAG output is
released in order to limit power dissipation. FLAG goes
low when any of the following conditions occur:
t
t
t
t
BLANK
BLANK
RETRY
BLANK
CURRENT
LIMIT
SHORT
CONDITION
REMOVED
LOAD
CURRENT
• The die temperature exceeds the thermal-shutdown
temperature limit of +150°C.
ON
SWITCH
STATUS
• The device is in current limit for more than the fault-
blanking period.
OFF
• V is below UVLO threshold.
IN
Figure 2. MAX4790/MAX4792/MAX4794 Autoretry Fault
Blanking Diagram
Autoretry (MAX4790/MAX4792/MAX4794)
When the forward or reverse current-limit threshold is
exceeded, t
timer begins counting (Figure 2).
BLANK
ing time. Reset the switch by either toggling ON (Figure
3a) or cycling the input voltage below UVLO, typically
2V (Figure 3b).
The timer resets if the overcurrent condition disappears
before t has elapsed. A retry time delay, t
,
RETRY
has elapsed and
BLANK
is started immediately after t
BLANK
during that time, the switch is latched off. At the end of
, the switch is turned on again. If the fault still
exists, the cycle is repeated. If the fault has been
removed, the switch stays on.
Fault Blanking
t
RETRY
The MAX4789–MAX4794 feature 14ms (min) fault blank-
ing. Fault blanking allows current-limit faults, including
momentary short-circuit faults that occur when hot
swapping a capacitive load, and also ensures that no
fault is issued during power-up. When a load transient
causes the device to enter current limit, an internal
counter starts. If the load-transient fault persists beyond
the fault-blanking timeout, the MAX4789/MAX4791/
MAX4793 FLAG asserts low. Load-transient faults less
The autoretry feature saves system power in the case
of an overcurrent or short-circuit condition. During
t
, when the switch is on, the supply current is at
BLANK
the current limit. During t
, when the switch is off,
RETRY
the current through the switch is zero. Instead of
observing the full load current, the switch sees the
equivalent load current times duty cycle or I
=
SUPPLY
). With a typical
than t
do not cause a FLAG output assertion. Only
BLANK
I
t
✕ t
/(t
+ t
LOAD
BLANK
BLANK BLANK
= 37ms and typical t
RETRY
current-limit faults are blanked.
= 259ms, the duty
RETRY
A thermal fault and input voltage drops below the
UVLO threshold cause FLAG to assert immediately and
do not wait for the blanking time.
cycle is 12%, which results in an 88% power savings
over the switch being on the entire time. The duty cycle
is consistent across the process and devices.
Thermal Shutdown
The MAX4789–MAX4794 have a thermal shutdown fea-
ture to protect the devices from overheating. The switch
turns off and FLAG goes low immediately (no fault blank-
ing) when the junction temperature exceeds +150°C.
The switch turns back on when the device temperature
drops approximately 15°C.
Latch Off (MAX4789/MAX4791/MAX4793)
When the forward or reverse current-limit threshold is
exceeded, t
timer begins counting. The timer
BLANK
resets if the overcurrent condition disappears before
has elapsed. The switch is shut off if the over-
t
BLANK
current condition continues up to the end of the blank-
_______________________________________________________________________________________
7
200mA/250mA/300mA Current-Limit Switches
the MAX4789–MAX4794 from tripping erroneously. If
t
t
BLANK
BLANK
the load capacitance is too large, then current may not
have enough time to charge the capacitance and the
device assumes that there is a faulty load condition.
The maximum capacitive load value that can be driven
from OUT is obtained by the following formula:
LOAD
CURRENT
ON
SWITCH
STATUS
I
× t
BLANK_MIN
FWD_MIN
C
<
MAX
OFF
V
IN
ON PIN
VOLTAGE
Layout and Thermal Dissipation
To optimize the switch response time to output short-
circuit conditions, it is very important to keep all traces
as short as possible to reduce the effect of undesirable
parasitic inductance. Place input and output capacitors
as close as possible to the device (no more than 5mm).
IN and OUT pins must be connected with short traces
to the power bus.
FLAG PIN
STATUS
(a)
t
t
BLANK
BLANK
LOAD
During normal operation, the power dissipation is small
and the package temperature change is minimal. If the
output is continuously shorted to ground at the maxi-
mum supply voltage, the operation of the switches with
the autoretry option does not cause problems because
the total power dissipated during the short is scaled by
the duty cycle:
CURRENT
ON
SWITCH
STATUS
OFF
IN PIN
VOLTAGE
UVLO
V
× IOUT_MAX × tBLANK
IN_MAX
PMAX
=
= 302mW
FLAG PIN
STATUS
tRETRY + tBLANK
where V = 5.5V, I = 450mA, t = 14ms, and
BLANK
(b)
IN
OUT
t
= 98ms.
Figure 3. MAX4789/MAX4791/MAX4793 Latch-Off Fault
Blanking
RETRY
Attention must be given to the MAX4789, MAX4791,
and MAX4793 where the latch-off condition must be
manually reset by toggling ON from high to low. If the
latch-off time duration is not sufficiently high, it is possi-
ble for the device to reach the thermal-shutdown
threshold and never be able to turn the device on until
it cools down.
Applications Information
Input Capacitor
To limit the input voltage drop during momentary output
short-circuit conditions, connect a capacitor from IN to
GND. A 0.1µF ceramic capacitor is adequate for most
applications; however, higher capacitor values further
reduce the voltage drop at the input and are recom-
mended for lower voltage applications.
Chip Information
TRANSISTOR COUNT: 1408
PROCESS: BiCMOS
Output Capacitance
Connect a 0.1µF capacitor from OUT to GND. This
capacitor helps prevent inductive parasitics from
pulling OUT negative during turn-off, thus preventing
8
_______________________________________________________________________________________
200mA/250mA/300mA Current-Limit Switches
Pin Configurations (continued)
Ordering Information (continued)
TOP
MARK
PART
TEMP RANGE PIN-PACKAGE
TOP VIEW
MAX4791EUS-T -40°C to +85°C 4 SOT143-4
KAFG
AEAE
ABQ
KAFH
ABR
MAX4791EUK-T -40°C to +85°C 5 SOT23-5
FLAG (N.C.)
GND
1
2
6
5
OUT
IN
MAX4791ETT
MAX4792EUS-T -40°C to +85°C 4 SOT143-4
MAX4792ETT -40°C to +85°C 6 TDFN-EP*
-40°C to +85°C 6 TDFN-EP*
MAX4789–
MAX4794
ON
3
4
N.C.
MAX4793EUS-T -40°C to +85°C 4 SOT143-4
KAFI
AEAG
ABS
MAX4793EUK-T -40°C to +85°C 5 SOT23-5
3mm x 3mm TDFN
MAX4793ETT
-40°C to +85°C 6 TDFN-EP*
MAX4794EUS-T -40°C to +85°C 4 SOT143-4
KAFJ
ABT
*( ) FOR THE MAX4790, MAX4792, AND MAX4794.
MAX4794ETT
-40°C to +85°C 6 TDFN-EP*
*EP = Exposed pad.
Selector Guide
PIN-
CURRENT
FLAG
AUTO-
PART
PACKAGE LIMIT (mA) FUNCTION RETRY
MAX4789EUS 4 SOT143
MAX4789EUK 5 SOT23
MAX4789ETT 6 TDFN
MAX4790EUS 4 SOT143
MAX4790ETT 6 TDFN
MAX4791EUS 4 SOT143
MAX4791EUK 5 SOT23
MAX4791ETT 6 TDFN
MAX4792EUS 4 SOT143
MAX4792ETT 6 TDFN
MAX4793EUS 4 SOT143
MAX4793EUK 5 SOT23
MAX4793ETT 6 TDFN
MAX4794EUS 4 SOT143
MAX4794ETT 6 TDFN
200
200
200
200
200
250
250
250
250
250
300
300
300
300
300
No
Yes
Yes
No
No
No
No
Yes
Yes
No
No
No
Yes
Yes
No
No
No
Yes
Yes
No
No
No
Yes
Yes
No
No
No
Yes
Yes
No
_______________________________________________________________________________________
9
200mA/250mA/300mA Current-Limit Switches
Package Information
(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.)
PACKAGE OUTLINE, SOT-143, 4L
1
21-0052
E
1
10 ______________________________________________________________________________________
200mA/250mA/300mA Current-Limit Switches
Package Information (continued)
(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.)
PACKAGE OUTLINE, SOT-23, 5L
1
21-0057
E
1
______________________________________________________________________________________ 11
200mA/250mA/300mA Current-Limit Switches
Package Information (continued)
(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.)
D2
D
A2
PIN 1 ID
N
0.35x0.35
b
[(N/2)-1] x e
REF.
PIN 1
INDEX
AREA
E
E2
DETAIL A
e
A1
k
C
C
L
L
A
L
L
e
e
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
1
-DRAWING NOT TO SCALE-
21-0137
G
2
COMMON DIMENSIONS
SYMBOL
MIN.
0.70
2.90
2.90
0.00
0.20
MAX.
0.80
3.10
3.10
0.05
0.40
A
D
E
A1
L
k
0.25 MIN.
0.20 REF.
A2
PACKAGE VARIATIONS
DOWNBONDS
ALLOWED
PKG. CODE
T633-1
N
6
D2
E2
e
JEDEC SPEC
b
[(N/2)-1] x e
1.90 REF
1.90 REF
1.95 REF
1.95 REF
1.95 REF
2.00 REF
2.40 REF
2.40 REF
1.50±0.10 2.30±0.10 0.95 BSC
1.50±0.10 2.30±0.10 0.95 BSC
1.50±0.10 2.30±0.10 0.65 BSC
1.50±0.10 2.30±0.10 0.65 BSC
1.50±0.10 2.30±0.10 0.65 BSC
MO229 / WEEA
MO229 / WEEA
MO229 / WEEC
MO229 / WEEC
MO229 / WEEC
0.40±0.05
0.40±0.05
0.30±0.05
0.30±0.05
0.30±0.05
NO
NO
T633-2
6
T833-1
8
NO
T833-2
8
NO
T833-3
8
YES
NO
T1033-1
T1433-1
T1433-2
10
14
14
1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05
1.70±0.10 2.30±0.10 0.40 BSC
1.70±0.10 2.30±0.10 0.40 BSC
- - - -
- - - -
0.20±0.05
0.20±0.05
YES
NO
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
2
-DRAWING NOT TO SCALE-
21-0137
G
2
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.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2005 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products, Inc.
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