MAX1823 Maxim, MAX1823 Datasheet - Page 8

• Manufacturer Part Number: MAX1823
• Description: The MAX1823 is a dual, current-limited switch with autoreset specifically made for USB applications
• Manufacturer: Maxim

Dual USB Switch with Fault
Blanking and Autoreset
*() are for the MAX1823B/MAX1823H only.
8
(Circuit of Figure 1, V
unless otherwise noted.)
_______________________________________________________________________________________
2, 3, 4
PIN
10
5
6
7
8
9
1
A
B
A: V
B: V
ONA
OUTA
, 5V/div
FAULTB
FAULTA
, 2V/div
INA, IN,
SWITCH TURN-OFF TIME
*(ONA)
*(ONB)
NAME
OUTB
OUTA
ONA
ONB
GND
INB
IN
= V
(t
OFF
1ms/div
INA
+ t
FALL
= V
C ontr ol Inp ut for S w i tch A. C an b e d r i ven hi g her than IN_ w i thout d am ag e. A l og i c l ow tur ns sw i tch A on for
the M AX 1823/M AX 1823A, and a l og i c hi g h tur ns sw i tch A on for the M AX 1823B/M AX 1823H .
Power Input. Connect all IN_ pins together, and bypass with a 0.1µF capacitor to ground. Load
conditions may require additional bulk capacitance to prevent the input from being pulled down.
Control Input for Switch B. Can be driven higher than IN_ without damage. A logic low turns switch B
on for the M AX 1823/M AX 1823A, and a logic high turns switch B on for the M AX 1823B/M AX 1823H .
Fault-Indicator Output for Switch B. This open-drain output goes low when switch B is in thermal
shutdown or UVLO or in a sustained (>20ms) current-limit or short-circuit condition.
Power Output for Switch B. Connect a 1µF capacitor from OUTB to ground. Load condition may
require additional bulk capacitance.
Ground
Power Output for Switch A. Connect a 1µF capacitor from OUTA to ground. Load condition may
require additional bulk capacitance.
Fault-Indicator Output for Switch A. This open-drain output goes low when switch A is in thermal
shutdown or UVLO or in a sustained (>20ms) current-limit or short-circuit condition.
)
INB
= 5V, ON_ = GND (MAX1823/MAX1823A), ON_ = IN_ (MAX1823B/MAX1823H), T
MAX1823 toc22
0
0
Typical Operating Characteristics (continued)
FUNCTION
C
D
A
B
A: V
B: V
ONA
FAULTA
(TYPICAL USB APPLICATION)
, 5V/div
, 5V/div
STARTUP TIME
500 s/div
C: V
D : I
OUTA
OUTA
Pin Description
, 0.5A/div
, 2V/div
MAX1823 toc23
0
5V
0
0
A
= +25 C,