Datasheet

Data Sheet ADP2109
Rev. B | Page 3 of 16
SPECIFICATIONS
V
IN
= 3.6 V, V
OUT
= 1.8 V, T
J
= −40°C to +125°C for minimum/maximum specifications, and T
A
= 25°C for typical specifications, unless
otherwise noted.
1
Table 1.
Parameters Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Input Voltage Range 2.3 5.5 V
Undervoltage Lockout Threshold V
IN
rising 2.3 V
V
IN
falling 2.05 2.15 2.25 V
OUTPUT CHARACTERISTICS
Output Voltage Accuracy PWM mode −2 +2 %
V
IN
= 2.3 V to 5.5 V, PWM mode −2.5 +2.5 %
POWER SAVE MODE TO PWM CURRENT THRESHOLD 85 mA
PWM TO POWER SAVE MODE CURRENT THRESHOLD
80
mA
INPUT CURRENT CHARACTERISTICS
DC Operating Current
I
LOAD
= 0 mA, device not switching
18
30
μA
Shutdown Current
EN = 0 V, T
A
= T
J
= −40°C to +85°C
0.2
1.0
μA
SW CHARACTERISTICS
SW On Resistance PFET 320 mΩ
NFET 300 mΩ
Current Limit PFET switch peak current limit 1100 1300 1500 mA
Discharge SW Resistance V
OUT
= 1.0 V 150 Ω
ENABLE CHARACTERISTICS
EN Input High Threshold 1.2 V
EN Input Low Threshold 0.4 V
EN Input Leakage Current EN = 0 V, 3.6 V −1 0 +1 μA
OSCILLATOR FREQUENCY I
LOAD
= 200 mA 2.5 3.0 3.5 MHz
START-UP TIME 550 μs
THERMAL CHARACTERISTICS
Thermal Shutdown Threshold 150 °C
Thermal Shutdown Hysteresis
20
°C
1
All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
MINIMUM INPUT AND OUTPUT CAPACITANCE C
MIN
T
A
= −40°C to +125°C 4.7 µF
MINIMUM AND MAXIMUM INDUCTANCE L T
A
= −40°C to +125°C 0.3 3.0 µH