Datasheet

ADP5020
Rev. 0 | Page 6 of 28
DC-TO-DC CONVERSION SPECIFICATIONS, BUCK 2 REGULATOR
Table 4.
Parameter Symbol Conditions Min Typ Max Unit
OUTPUT VOLTAGE
Adjustable Range
1
V
OUT2
4-bit range 1.1 1.8 V
Initial Accuracy T
A
= 25°C, V
DD2
= 3.6 V, V
OUT2
= 1.2 V, I
LOAD
= 20 mA −1 +1 %
Total Accuracy V
DD2
= 2.5 V to 5 V, I
LOAD
= 10 mA to 250 mA −5 +4 %
Load Regulation I
LOAD
= 10 mA to 250 mA 0.2 %
Line Regulation V
DDA
= 1.8 V, V
DD2
= 2.5 V to 5 V 0.15 %
CURRENT
Maximum Output Current I
BK2MAX
250 mA
Quiescent Current I
QBK2
I
LOAD
= 0 mA 4 6.5 mA
POWER
Low-Side Power nMOSFET R
DSON2
I
D
= 200 mA 240 330 mΩ
High-Side Power pMOSFET R
DSON2
I
D
= 200 mA 300 450 mΩ
SWITCH CURRENT LIMIT I
CL2
360 630 850 mA
MINIMUM ON TIME t
MIN2
55 ns
MAXIMUM DUTY CYCLE D
MAX2
87.5 90 %
SOFT START TIME t
SS2
900 μs
C
OUT
DISCHARGE SWITCH ON RESISTANCE R
DIS2
0.7 1 1.3 kΩ
1
See (the BUCK2_LDO_VSEL register, Address 0x02) for details. Table 14
VOUT3 SPECIFICATIONS, LOW DROPOUT (LDO) REGULATOR
Table 5.
Parameter Symbol Conditions Min Typ Max Unit
OUTPUT VOLTAGE
Adjustable Range
1
V
OUT3
100 mV step, 4-bit range 1.8 3.3 V
Initial Accuracy
T
A
= 25°C, V
DD3
= 3.6 V, V
OUT3
= 1.8 V, I
LOAD
= 10 mA
−1.5 +1.5 %
Total Accuracy V
DD3
= 2.5 V to 5 V, I
LOAD
= 0 mA to 150 mA −5 +4 %
Load Regulation I
LOAD
= 10 mA to 100 mA 0.45 0.75 %
Line Regulation I
LOAD
= 100 mA
2
0.15 0.30 %
CURRENT
Maximum Output Current I
LDOMAX
150 mA
Dropout Voltage V
LDODROP
At 100 mA, V
OUT3
= 3.3 V 70 100 mV
Quiescent Current I
Q
I
LOAD
= 0 mA 45 85 μA
Short-Circuit Current Limit 200 400 600 mA
Power Supply Rejection Ratio PSRR
f = 1 kHz, V
DD3
= 5 V, V
OUT3
= 3.3 V, I
LOAD
= 50 mA 47 dB
f = 10 kHz, V
DD3
= 5 V, V
OUT3
= 3.3 V, I
LOAD
= 50 mA 44 dB
SOFT START TIME t
SS2
70 μs
C
OUT
DISCHARGE SWITCH ON RESISTANCE R
DIS8
0.7 1 1.3 kΩ
1
See (the BUCK_LDO_VSEL register, Address 0x02) for details. Table 14
2
V
DD3
> V
OUT3
+ L
DODROP
.