MAX1730EUB-T Maxim Integrated Products, MAX1730EUB-T Datasheet - Page 5

• 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

(V
IN
PIN
10
1
2
3
4
5
6
7
8
9
= +3.6V, FB = GND, SHDN = IN, C
LINE-TRANSIENT RESPONSE
NAME
SHDN
PGND
GND
OUT
C1N
C2N
C1P
C2P
10µs/div
FB
IN
50mA Regulated Step-Down Charge Pump
_______________________________________________________________________________________
Feedback Input. Connect FB to GND for a 1.8V output. Connect FB to IN for a 1.9V output. Do not leave FB
unconnected.
Active-Low Shutdown Input. Connect to logic control or to IN for normal operation. OUT disconnects from the
input in shutdown and goes to high impedance.
C1 Flying Capacitor Positive Connection
C1 Flying Capacitor Negative Connection
Ground
Power Ground
C2 Flying Capacitor Negative Connection
C2 Flying Capacitor Positive Connection
Output. Bypass to GND with a 4.7µF or greater capacitor.
Input Supply. Connect to a +2.7V to +5.5V supply. Bypass to GND with a 1µF ceramic capacitor as close to
the IC as possible.
MAX1730 TOC07
4V
V
3V
V
AC-COUPLED
50mV/div
IN
OUT
IN
= 1µF, C1 = C2 = 0.22µF, C
Typical Operating Characteristics (continued)
LOAD-TRANSIENT RESPONSE
10µs/div
OUT
FUNCTION
MAX1730 TOC08
for 1.8V or 1.9V Logic
= 4.7µF, T
50mA
I
5mA
V
AC-COUPLED
20mV/div
OUT
OUT
A
= +25°C, unless otherwise noted.)
50mA/div
1V/div
V
5V/div
SHDN
V
I
IN
O
STARTUP AND SHUTDOWN RESPONSE
Pin Description
100µs/div
R
MAX1730 TOC09
L
= 72Ω
5