MAX750AESA+ Maxim Integrated Products, MAX750AESA+ Datasheet - Page 11

• Manufacturer Part Number: MAX750AESA+
• Description: IC REG PWM ADJ 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck), PWM - Current Moder

Specifications of MAX750AESA+

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 11 V
• Current - Output: 450mA
• Frequency - Switching: 170kHz
• Voltage - Input: 4 ~ 11 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Voltage - Supply: 4 V ~ 11 V
• Frequency-max: 210kHz
• Duty Cycle: 92%
• Pwm Type: Current Mode
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 3. Standard Step-Down Circuit
and GND pins as possible. Also, place the output
capacitor as close to the inductor and the GND pin as
possible. The traces connecting the input and output
filter capacitors and the catch diode must be short to
minimize inductance and capacitance. For this reason,
avoid using sockets, and solder the IC directly to the
PC board. Use an uninterrupted ground plane if possi-
ble; otherwise, use a star ground connection.
*
SEE TABLE 2 FOR EXTERNAL COMPONENT SUPPLIERS.
0.1µF
510k
C1
R1
MAX750A: 4.0V TO 11.0V
MAX758A: 4.0V TO 16.0V
______________________________________________________________________________________
1
3
SS
SHDN
GND
6
MAX750A
MAX758A
8
V+
NOTE: PIN NUMBERS REFER TO 8-PIN PACKAGES.
MAX750A
MAX758A
PART
REF
2
I.C.
CC
LX
C6
0.01µF
7
5
4
INPUT SUPPLY RANGE
Current-Mode PWM Regulators
10.2 to 16.0
6.0 to 11.0
6.0 to 16.0
C2
1µF
C3
C5
330pF
D1
IN5817
*
(V)
R2
40.2k
R3
13.0k
Adjustable, Step-Down,
A simple lowpass pi-filter (Figure 3) can be added to
the output to reduce output ripple to about 5mVp-p.
The cutoff frequency with the values shown is 21kHz.
Since the filter inductor is in series with the circuit out-
put, its resistance should be kept to a minimum so the
voltage drop across it is not excessive.
GUARANTEED OUTPUT CURRENT AT 5V OUTPUT
L1
C4
OUTPUT
*
*
5V
OPTIONAL LOWPASS OUTPUT FILTER
OUTPUT
(mA)
450
450
750
Output-Ripple Filtering
25µF
L2
2.2µF
C7
OUTPUT
FILTER
11