Electronic Components Datasheet Search |
|
MAX869L Datasheet(PDF) 6 Page - Maxim Integrated Products |
|
MAX869L Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 8 page _______________Detailed Description The MAX869L P-channel MOSFET power switch limits output current to a programmed level. When the output current passes through the main switch, a smaller cur- rent also passes through the replica switch (IOUT / 955) and through RSET (Figure 1). When the voltage on RSET exceeds the trip voltage of 1.24V, the current-limit error amplifier regulates the output current to the pro- grammed current limit, ILIMIT (400mA to 2.4A). This switch is not bidirectional; therefore, the input volt- age must be higher than the output voltage. Setting the Current Limit The MAX869L features internal current-limiting circuitry with a maximum programmable value (IMAX) of 2.4A. For best performance, set the current limit (ILIMIT) between 0.2 IMAX ≤ ILIMIT ≤ IMAX. This current limit remains in effect throughout the input supply-voltage range. Program the current limit with a resistor (RSET) from SET to ground (Figure 2) as follows: ISET = ILIMIT / 955 RSET = 1.24V / ISET = 1,184 / ILIMIT where ILIMIT is the desired current limit. 2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown 6 _______________________________________________________________________________________ VIN = 5V, IOUT = 1A, CIN = 1µF, COUT = 120µF A: VON, 5V/div B: VOUT, 2V/div *REFER TO TYPICAL OPERATING CIRCUIT USB* CIRCUIT OUTPUT RISE TIME A B C D 0V 0V 0V 0A 500µs/div C: IOUT, 0.5A/div D: VFAULT, 2V/div ____________________________Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) USB* CIRCUIT OUTPUT FALL TIME A B C D 0V 0V 0V 0A 500µs/div VIN = 5V, IOUT = 1A, CIN = 1µF, COUT = 120µF A: VON, 5V/div B: VOUT, 2V/div C: IOUT, 0.5A/div D: VFAULT, 2V/div _____________________Pin Description PIN Input, P-channel MOSFET source. Bypass IN with a 1µF capacitor to ground. IN 1, 4, 5, 12, 13, 16 FUNCTION NAME Switch output. P-channel MOSFET drain. Bypass OUT with a 0.1µF capacitor to GND. OUT 2, 3, 6, 11, 14, 15 Ground GND 8 Active-Low Switch-On Input. A logic low turns the switch on. ON 7 Fault-Indicator Output. This open- drain output goes low when in cur- rent limit or when the die temperature exceeds +135°C. FAULT remains low for Turn-On Time + 50µs during start- up. FAULT 10 Set Current-Limit Input. A resistor from SET to ground sets the current limit for the switch. RSET = 1,184 / ILIMIT, where ILIMIT is the desired cur- rent limit in amperes. SET 9 |
Similar Part No. - MAX869L |
|
Similar Description - MAX869L |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |