Datasheet

Data Sheet ADP2126/ADP2127
Rev. B | Page 3 of 20
SPECIFICATIONS
V
IN
= 3.6 V, T
A
= 25°C for typical specifications, and T
A
= T
J
= −40°C to +85°C for minimum and maximum specifications, unless
otherwise noted.
All specifications at temperature extremes are guaranteed via correlation using the standard statistical quality control
(SQC) methods. Typical specifications are not guaranteed.
Table 1.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
SUPPLY
Operating Input Voltage Range V
IN
2.1 5.5 V
PWM Mode Quiescent Current No load, V
MODE
= V
IN
12 mA
Auto Mode Quiescent Current No load, V
MODE
= 0 V, V
FB
> V
OUT
, SW = open 300 500 μA
Shutdown Current
1
V
EXTCLK
= 0 V, open loop 0.3 1.5 μA
UNDERVOLTAGE LOCKOUT
Rising V
IN
Threshold 1.9 2.1 V
Falling V
IN
Threshold 1.5 1.8 V
OUTPUT
Continuous Output Current
2
I
LOAD
V
IN
= 2.1 V to 5.5 V 500 mA
PWM Mode Output Accuracy
3
V
OUT
V
IN
= 2.1 V to 5.5 V, no load V
OUT
− 2% V
OUT
+ 2% V
PFM Mode Output Accuracy
3, 4
V
IN
= 2.1 V to 5.5 V V
OUT
− 3% V
OUT
+ 3% V
FB Bias Current V
FB
= V
OUT
4 9 μA
FB Pull-Down Resistance R
DSCHG
V
EXTCLK
= 0 V, I
FB
= 10 mA 110 180 Ω
SWITCHING CHARACTERISTICS
PMOS On Resistance I
SW
= 500 mA 180 340 mΩ
NMOS On Resistance I
SW
= 500 mA 250 mΩ
SW Leakage Current V
SW
= 0 V, V
IN
= 5.5 V 10 μA
PMOS Switch Current Limit Open loop 770 1000 1291 mA
PFM Current Limit V
MODE
= 0 V, V
IN
= 3.6 V 170 260 305 mA
Oscillator Frequency f
SW
4.8 6 6.8 MHz
SHORT-CIRCUIT PROTECTION
Rising V
OUT
Threshold 0.55 0.7 V
Falling V
OUT
Threshold 0.4 0.52 V
EXTCLK INPUT
High Threshold Voltage V
EXTCLK(H)
V
IN
= 2.1 V to 5.5 V 1.3 V
Low Threshold Voltage V
EXTCLK(L)
V
IN
= 2. 1 V to 5.5 V 0.4 V
Leakage Current V
IN
= 5.5 V, V
EXTCLK
= 2.1 V to 5.5 V 0.01 1 μA
Duty Cycle Operating Range D
EXTCLK
40 60 %
Frequency Operating Range f
EXTCLK
6 27 MHz
MODE INPUT LOGIC
High Threshold Voltage V
MODE(H)
V
IN
= 2.1 V to 5.5 V 1.3 V
Low Threshold Voltage V
MODE(L)
V
IN
= 2.1 V to 5.5 V 0.4 V
Leakage Current V
EXTCLK
= 0 V, V
IN
= V
MODE
= 5.5 V 0.005 1 μA
THERMAL SHUTDOWN
5
PWM mode only
Thermal Shutdown Threshold 146 °C
Thermal Shutdown Hysteresis 13 °C