IC REG PWM STEP-DWN ADJ 8-SOIC

 

MAX750ACSA

Manufacturer Part NumberMAX750ACSA
DescriptionIC REG PWM STEP-DWN ADJ 8-SOIC
ManufacturerMaxim Integrated Products
TypeStep-Down (Buck), PWM - Current Mode
MAX750ACSA datasheets

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Specifications of MAX750ACSA

Internal Switch(s)YesSynchronous RectifierNo
Number Of Outputs1Voltage - Output1.25 ~ 11 V
Current - Output450mAFrequency - Switching170kHz
Voltage - Input4 ~ 11 VOperating Temperature0°C ~ 70°C
Mounting TypeSurface MountPackage / Case8-SOIC (3.9mm Width)
Voltage - Supply4 V ~ 11 VFrequency-max210kHz
Duty Cycle92%Pwm TypeCurrent Mode
BuckYesBoostNo
FlybackNoInvertingNo
DoublerNoDividerNo
CukNoIsolatedNo
Lead Free Status / RoHS StatusContains lead / RoHS non-compliant  
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MAX750A: 4.0V TO 11.0V
MAX758A: 4.0V TO 16.0V
8
V+
1
SHDN
LX
MAX750A
R1
MAX758A
I.C.
510k
3
SS
CC
GND
REF
C1
6
2
C6
0.1µF
0.01µF
PART
MAX750A
MAX758A
NOTE: PIN NUMBERS REFER TO 8-PIN PACKAGES.
*
SEE TABLE 2 FOR EXTERNAL COMPONENT SUPPLIERS.
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.
______________________________________________________________________________________
Adjustable, Step-Down,
Current-Mode PWM Regulators
C2
1µF
*
C3
7
D1
IN5817
*
L1
5
OUTPUT
5V
C5
R2
*
C4
330pF
40.2k
4
R3
13.0k
INPUT SUPPLY RANGE
GUARANTEED OUTPUT CURRENT AT 5V OUTPUT
(V)
6.0 to 11.0
6.0 to 16.0
10.2 to 16.0
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.
OPTIONAL LOWPASS OUTPUT FILTER
L2
FILTER
25µF
OUTPUT
OUTPUT
C7
2.2µF
(mA)
450
450
750
Output-Ripple Filtering
11

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