MAX1972EEE+ Maxim Integrated Products, MAX1972EEE+ Datasheet - Page 10

• Manufacturer Part Number: MAX1972EEE+
• Description: IC REG STP DWN 750MA 16-QSOP
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1972EEE+

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 1.5V, 1.8V, 2.5V, 3.3V, Adj
• Current - Output: 750mA
• Frequency - Switching: 1.4MHz
• Voltage - Input: 2.6 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Power - Output: 667mW
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-
Down Regulator with POR and RSI/PFO
(T
10
A
PIN
= +25°C, unless otherwise noted.)
1
2
3
4
5
6
7
8
______________________________________________________________________________________
MAX1970/MAX1972
COMP1
COMP2
GND
V
LX1
FB1
FB2
REF
CC
NAME
MAX1971
COMP1
COMP2
GND
V
LX1
FB1
FB2
REF
CC
Typical Operating Characteristics (continued)
Inductor Connection 1. Connect an inductor between LX1 and OUT1.
Analog Supply Voltage. Bypass with 0.1µF to ground.
OUT1 Regulator Compensation. Connect series RC network from COMP1 to GND.
COMP1 is pulled to GND when the outputs are shut down. See the Compensation
Design section for component values.
OUT1 Feedback. Connected to OUT1 for internal mode (FBSEL1 = GND or V
Use an external resistor-divider from OUT1 to GND to set the output voltage from
1.2V to V
Selection section for <1.2V output.
OUT2 Feedback. Connected to OUT2 for internal mode (FBSEL2 = GND or V
Use an external resistor-divider from OUT2 to GND to set the output voltage from
1.2V to V
Selection section for <1.2V output.
OUT2 Regulator Compensation. Connect series RC network from COMP2 to GND.
COMP2 is pulled to GND when the outputs are shut down. See the Compensation
Design section for component values.
Reference. Bypass with 0.01µF to 1.0µF capacitor. REF controls the soft-start
ramp and is pulled to GND when the outputs are shut down.
Ground
MAX1970
V
V
I
OUT1
IN
OUT1
V
V
= 5V
OUT2
OUT1
POR
EN
= 375mA, I
= 3.3V, V
IN
IN
SHUTDOWN RESPONSE
for external mode (FBSEL1 = unconnected). See the Output Voltage
for external mode (FBSEL2 = unconnected). See the Output Voltage
OUT2
OUT2
= 2.5V
5ms/div
= 375mA
FUNCTION
5V/div
Pin Description
CC
CC
).
).