AMS1027 AMS [Advanced Monolithic Systems Ltd], AMS1027 Datasheet - Page 3

• Manufacturer Part Number: AMS1027
• Description: On Board Power MOSFET
• Manufacturer: AMS [Advanced Monolithic Systems Ltd]

PIN FUNCTIONS
ELECTRICAL CHARACTERISTICS
V
Parameters
Operating Input Voltage
Undervoltage Lockout
Undervoltage Lockout
Hysteresis
Supply Current (Shutdown)
Supply Current (Quiescent)
Switching Frequency
Maximum Duty Cycle
EN Threshold
EN Threshold
EN Hysteresis
EN Input Bias Current
FB Voltage
FB Input Bias Current
SW On-Resistance
SW Current Limit
SW Leakage
Thermal Shutdown
IN
Pin #
= V
1
2
3
4
5
EN
Name Function
= 5V, T
GND
SW
EN
FB
IN
Power Switch Output. SW is the drain of the internal MOSFET switch. Connect the power
inductor and output rectifier to SW. SW can swing between GND and 22V.
Ground.
Feedback Input. FB voltage is 1.25V. Connect a resistor divider to FB.
Regulator On/Off Control Input. A high input at EN turns on the converter, and a low input turns
it off. When not used, connect EN to the input source for automatic startup. The EN pin cannot
be left floating.
Input Supply Pin. Must be locally bypassed.
A
= +25°C unless otherwise specified.
Advanced Monolithic Systems http://www.ams-semitech.com
Symbol
R
DS (ON)
V
V
f
SW
FB
IN
Condition
V
V
V
V
V
V
V
V
EN
FB
FB
EN
EN
EN
FB
SW
= 1.3V
= 0V
= 0V
Rising
= 1.25V
Rising, V
= 0V, 5V
= 15V
3
IN
= 2.5V
–100
1.21
Min
2.5
1.0
1.1
85
0.8
2.25
1.25
0.5
Typ
1.35
635
90
–30
160
0.1
1.3
1.9
92
92
1
AMS1027
1.6
Max
2.45
1.29
850
1.5
6
1
1
Units
MHz
mV
mV
µA
µA
µA
µA
nA
°C
%
Ω
V
V
V
V
A
V