MAX1730EUB-T Maxim Integrated Products, MAX1730EUB-T Datasheet - Page 8

• Manufacturer Part Number: MAX1730EUB-T
• Description: Charge Pumps 50mA Regulated Step-Down
• Manufacturer: Maxim Integrated Products

Specifications of MAX1730EUB-T

• Function: Step Down
• Output Voltage: 1.8 V, 1.9 V
• Output Current: 50 mA
• Maximum Operating Temperature: + 85 C
• Package / Case: uMAX-10
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT

The MAX1730 features an active-low shutdown pin
(SHDN) to decrease supply current to below 5µA.
When in shutdown, the output disconnects from the
input and OUT goes to high impedance.
The input capacitor provides the charge pump with a low-
impedance supply. For most applications, a 1µF ceramic
capacitor is adequate. Lower-value capacitors and those
with higher ESR may be inadequate for proper operation
and may result in lower output current capability and
higher output ripple.
To reduce the output voltage ripple, the value of the
output capacitor should exceed that of the flying
capacitors (C1 + C2) by 10:1 or more. Values for C1
and C2 between 0.22µF and 0.47µF are recommended
for most applications. Use ceramic capacitors to
increase maximum output current and improve efficiency.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2000 Maxim Integrated Products
50mA Regulated Step-Down Charge Pump
for 1.8V or 1.9V Logic
Note: The MAX1730 does not have an exposed pad.
Capacitor Selection
Printed USA
Shutdown
The MAX1730’s high-frequency operation demands
careful layout. All components should be placed as
close to the IC as possible, with priority going to CIN,
C1, and C2. Traces should be kept short, wide, and as
straight as possible. Connect PGND and GND together
with a low-impedance ground plane.
TRANSISTOR COUNT: 2295
is a registered trademark of Maxim Integrated Products.
Package Information
Layout Considerations
Chip Information