MAX8577

IN to GND (MAX8576/MAX8577) ..........................-0.3V to +30V
VL to GND (MAX8576/MAX8577).............................-0.3V to +6V
IN to VL (MAX8576/MAX8577) .............................-0.3V to +30V
V_CC to GND (MAX8578/MAX8579) ..........................-0.3V to +6V
SS to GND (MAX8576/MAX8577) ...............-0.3V to (V_VL + 0.3)V
SS to GND (MAX8578/MAX8579)...............-0.3V to (V_CC + 0.3)V
DL to GND (MAX8576/MAX8577) ...............-0.3V to (V_VL + 0.3)V
DL to GND (MAX8578/MAX8579) ..............-0.3V to (V_CC + 0.3)V
BST to GND...........................................................-0.3V to +36V
BST to LX................................................................-0.3V to +6V
LX to GND ...................-1V (-2.5V for <50ns Transient) to +30V
DH to LX................................................-0.3V to +(VBST + 0.3)V
FB to GND ..............................................................-0.3V to +6V
EN to GND (MAX8578/MAX8679EUB)......................-0.3V to +6V
OCSET to GND (MAX8576/MAX8677) ........-0.3V to (VIN + 0.3)V
OCSET to GND (MAX8578/MAX8679) ...................-0.3V to +30V
OCSET to LX (MAX8576/MAX8677) ...........-0.6V to (VIN + 0.3)V
OCSET to LX (MAX8578/MAX8679).......................-0.6V to +30V
DH and DL Continuous Current ............................±250mA RMS
Continuous Power Dissipation (T_A = +70°C)
   10-Pin MAX (derate 5.6mW/°C above +70°C) .........444mW
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

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.

The MAX8577 synchronous PWM buck controllers use a hysteretic voltage-mode control algorithm to achieve a fast transient response without requiring loop compensation. The MAX8576/MAX8577 contain an internal LDO regulator allowing the controllers to function from only one 3V to 28V input supply. The MAX8578/MAX8579 do not contain the internal LDO and require a separate supply to power the IC when the input supply is higher than 5.5V. The MAX8577 output voltages are adjustable from 0.6V to 0.9 x V_IN at loads up to 15A.

Nominal switching frequency of MAX8577 is programmable over the 200kHz to 500kHz range. High-side MOSFET sensing is used for adjustable hiccup current-limit and short-circuit protection. The MAX8576/MAX8578 can start up into a precharged output without pulling the output voltage down. The MAX8577/MAX8579 have startup output overvoltage protection (OVP), and will pull down a precharged output.