Datasheet

MAX1946
Single USB Switch with Autoreset and
Fault Blanking in Tiny TDFN
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, OUT, SEL to GND........................................-0.3V to +6V
FAULT to GND.............................................-0.3V to (V
IN
+ 0.3V)
IN to OUT..................................................................-0.3V to +6V
OUT Continuous Switch Current (internally limited)..............1.3A
FAULT DC Current ..............................................................10mA
Continuous Power Dissipation (T
A
= +70°C)
Exposed Pad Must be Soldered to PC Board
8-Pin TDFN (derate 23.8mW/°C above +70°C) .........1905mW
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
= 5V, C
IN
= 0.1µF, C
OUT
= 1µF, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note1)
PARAMETER
SYM B O L
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage Range V
IN
2.7 5.5 V
V
IN
= 5, T
A
= +25°C 75 90
V
IN
= 5V 110Switch On-Resistance R
ON
V
IN
= 3.3V 125
mΩ
Standby Supply Current Switch disabled 3 10 µA
Quiescent Supply Current I
IN
Switch enabled, I
OUT
= 0 40 60 µA
Switch disabled, V
OUT
= 0, T
A
= +25°C
0.01
1
OUT Off-Leakage Current I
LKG
Switch disabled, V
OUT
= 0, T
A
= +85°C 0.2
µA
Undervoltage Lockout Threshold
V
ULVO
Rising edge, 3% hysteresis 2.3 2.5 2.7 V
Continuous Load Current
500
mA
Continuous Current Limit I
LIM
V
IN_
- V
OUT
= 0.5V
0.74
1.1
1.20
A
0.8 1.2 1.6 A
PK
Short-Circuit Current Limit I
SC
V
OUT
= 0 (I
OUT
pulsing)
0.35 A
RMS
Short-Circuit Detect Threshold (Note 2) 1 V
Continuous Current-Limit
Blanking Timeout Period
From continuous current-limit condition to
FAULT asserted
10 20 35 ms
Short-Circuit Blanking Timeout
Period
From short-circuit current-limit condition to
FAULT asserted
7.5 18
35.0
ms
Turn-On Delay t
ON
R
OUT
= 10Ω, time from ON to 10% of V
OUT
,
does not include rise time
0.25
0.6
1.50
ms
Output Rise Time t
RISE
R
OUT
= 10Ω, from 10% to 90% of V
OUT
1.2 ms
Turn-Off Delay t
OFF
R
OUT
= 10Ω, time from ON to 90% of V
OUT
,
does not include fall time
0.8 2 ms
Output Fall Time t
FALL
R
OUT
= 10Ω, from 90% to 10% of V
OUT
3ms
Thermal-Shutdown Threshold 15
o
C hysteresis
160
°C