MAX8650EEG+ Maxim Integrated Products, MAX8650EEG+ Datasheet - Page 9

• Manufacturer Part Number: MAX8650EEG+
• Description: IC CNTRLR STP DWN 24-QSOP
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX8650EEG+

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.7 ~ 5.5 V
• Current - Output: 25A
• Frequency - Switching: 200kHz ~ 1.2MHz
• Voltage - Input: 4.5 ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Power - Output: 762mW
• Output Voltage: 0.7 V to 5.5 V
• Output Current: 25 A
• Input Voltage: 4.5 V to 28 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN
17
18
19
20
21
22
23
24
4.5V to 28V Input Current-Mode Step-Down
SCOMP
COMP
NAME
REFIN
ILIM2
POK
OVP
_______________________________________________________________________________________
FB
SS
Controller with Adjustable Frequency
Output Voltage Sensing for Overvoltage Protection. Connect OVP to the center of a resistor-divider
from OUT to GND to set the FB independent output overvoltage trip point. Connect OVP to FB if this
independence is not desired. The OVP threshold is 115% of the nominal FB regulation voltage.
Feedback Input. Connect FB to the center of a resistor voltage-divider between the output and GND
to set the output voltage. The FB threshold regulates at 0.7V or V
Loop Compensation. Connect COMP to an external RC network to compensate the loop. COMP is
internally pulled to GND through 20Ω during shutdown.
Soft-Start. Connect a 0.1µF to 1µF ceramic capacitor from SS to GND. This capacitor sets the soft-
start period during startup. SS is internally pulled to GND through 20Ω during shutdown.
External Reference Input. Connect REFIN to AVL to use the internal 0.7V reference for the feedback
threshold.
P r og r am m ab l e C ur r ent- Li m i t Inp ut for the Low - S i d e M OS FE T ( LX - P G N D ) . C onnect a r esi stor fr om ILIM 2
to GN D to set the val l ey cur r ent- l i m i t thr eshol d . ILIM 2 sour ces 5µA thr oug h the r esi stor , and the vol tag e
at ILIM 2 i s attenuated 5:1 to set the fi nal cur r ent l i m i t. For exam p l e, a 50kΩ r esi stor r esul ts i n 250m V at
ILIM 2. Thi s r esul ts i n a cur r ent- l i m i t thr eshol d ( V
Programmable Slope-Compensation Input. The slope-compensation voltage rate is the voltage at
SCOMP times 0.1 divided by the oscillator period (T). Connect SCOMP to AVL or GND to set to the
default of 250mV/T or 125mV/T, respectively.
Open-Drain Output that Is High Impedance when the Output Voltage Rises Above 92% of the
Nominal Regulation Value. POK pulls low during shutdown and when the output drops below 88% of
the nominal regulation value.
FUNCTION
L X
- V
P GN D
Pin Description (continued)
) of 50m V . V
REFIN
I LI M 2
.
m ust not exceed 1V .
9