Datasheet

ADP2121
Rev. B | Page 3 of 20
SPECIFICATIONS
V
IN
= EN = 3.6 V; V
OUT
= 1.8 V, 1.82 V, 1.85 V, 1.875 V, and 2.3 V; typical values are at T
A
= 25°C; and minimum/maximum limits
guaranteed for T
J
= −40°C to +125°C,
1
Table 2.
unless otherwise noted.
Parameters Conditions Min Typ Max Unit
SUPPLY
Input Voltage Range V
OUT
= 1.8 V, 1.82 V, 1.85 V, 1.875 V 2.3 5.5 V
V
OUT
= 2.3 V 2.9 5.5 V
Quiescent Current Auto mode, no load, not switching, T
A
= −40°C to 85°C 36 56 µA
PWM mode, no load 10 mA
Shutdown Current V
OUT
= 1.8 V, 1.82 V, 1.85 V, 1.875 V, V
EN
= 0 V, T
A
= −40°C to 85°C 0.3 1 µA
V
OUT
= 2.3 V, V
EN
= 0 V, T
A
= −40°C to 85°C 0.4 1.5 µA
UNDERVOLTAGE LOCKOUT
Undervoltage Lockout Threshold V
OUT
= 1.8 V, 1.82 V, 1.85 V, 1.875 V, V
IN
rising 2.1 2.3 V
V
OUT
= 1.8 V, 1.82 V, 1.85 V, 1.875 V, V
IN
falling 1.6 2.0 V
V
OUT
= 2.3 V, V
IN
rising 2.4 2.6 V
V
OUT
= 2.3 V, V
IN
falling 1.9 2.3 V
OUTPUT
Maximum Continuous Output Current
2
V
OUT
= 1.8 V, 1.82 V, 1.85 V, 1.875 V, V
IN
= 2.3 V 300 mA
V
OUT
= 1.8 V, 1.82 V, 1.85 V, 1.875 V, V
IN
= 2.5 V 500 mA
V
OUT
= 1.8 V, 1.82 V, 1.85 V, 1.875 V, V
IN
= 2.7 V to 5.5 V 600 mA
V
OUT
= 2.3 V, V
IN
= 2.9 V to 5.5 V 600 mA
Output Voltage Accuracy
3
Auto mode, V
IN
= 3.6 V, T
A
= 25°C, no load, with respect to V
OUT
−3 +3 %
PWM mode, V
IN
= 2.5 V to 4.5 V, no load, with respect to V
OUT
−3 +3 %
Load Regulation
4
PWM mode, I
LOAD
= 1 mA to 600 mA −0.2 %/A
Feedback Bias Current V
OUT
= 1.8 V, V
FB
= 1.8 V and V
OUT
= 1.82 V, V
FB
= 1.82 V 3.8 8 µA
V
OUT
= 1.85, V
FB
= 1.85 V and V
OUT
= 1.875 V, V
FB
= 1.875 V 4.1 8 µA
V
OUT
= 2.3 V, V
FB
= 2.3 V 6.4 8 µA
SWITCHING CHARACTERISTICS
SW On Resistance (R
DSon
) P-channel switch 220 440 mΩ
N-channel synchronous rectifier 260 550 mΩ
SW Leakage Current V
IN
= 5.5 V, V
SW
= 0 V and 5.5 V 5 µA
SW Current Limit P-channel switch, open loop, T
A
= −40°C to 125°C 790 1000 1222 mA
P-channel switch, open loop, T
A
= −40°C to 85°C 828 1000 1222 mA
Oscillator Frequency 5.36 6 6.64 MHz
EN/MODE INPUT LOGIC V
IN
= 2.3 V to 5.5 V
High Threshold Voltage 1.3 V
Low Threshold Voltage 0.4 V
Leakage Current V
IN
= V
EN
= V
MODE
= 5.5 V 0.01 1 µA
SOFT START Time from EN ≥ 1.2 V to stable V
OUT
Soft Start Period
5
V
OUT
= 1.82 V, R
LOAD
= 5.1 Ω 275 310 µs
V
OUT
= 1.8 V, 1.85 V, 1.875 V, R
LOAD
= 5.1 Ω 75 85 µs
V
OUT
= 2.3 V, R
LOAD
= 5.1 Ω 100 115 µs
SHORT-CIRCUIT THRESHOLD 1.24 V
THERMAL SHUTDOWN
Thermal Shutdown Threshold 150 °C
Thermal Shutdown Hysteresis 15 °C
1
All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC); typical values are at T
A
= 25°C.
2
Guaranteed by design. The maximum output current guarantee for 2.3 V to 2.5 V increases linearly from 300 mA to 500 mA. The maximum output current guarantee for 2.5 V to
2.7 V increases linearly from 500 mA to 600 mA. For greater than 2.7 V, the maximum output current guarantee is 600 mA.
3
Transients not included in voltage accuracy specifications. For PFM mode, the VOUT accuracy specification is for the upper point of the ripple.
4
The load regulation typical value includes all voltage options. The typical value is different for each voltage option, but can be up to −0.2%/A.
5
Typical value characterized on bench. Maximum specification guaranteed by design. C
IN
= 2.2 µF (GRM155R60J225M), L = 0.47 µH (LQM2HPNR47MG0L), C
OUT
= 4.7 µF
(GRM155R60J475ME87D).