Datasheet

LT8616
3
8616fa
For more information www.linear.com/LT8616
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Common
Quiescent Current EN/UV1 = EN/UV2 = 0V, Current from V
IN1
l
1.7
1.7
4.0
8.0
µA
µA
EN/UV1 = EN/UV2 = 2V, SYNC = 0V (Burst Mode), Not Switching,
Current from V
IN1
l
3.0
3.0
5.0
12.0
µA
µA
EN/UV1 = EN/UV2 = 2V, SYNC = 3V (Pulse-Skipping Mode), Not
Switching, Current from BIAS or V
IN1
l
0.5 1.0 mA
FB Voltage V
IN
= 6V, Load = 0.5A
l
782
778
790
790
798
802
mV
mV
FB V
oltage Line Regulation V
IN
= 4V to 25V, Load = 0.5A 0.005 %/V
FB Pin Input Current FB = 0.79V –20 20 nA
EN/UV Pin Threshold Rising
l
0.97 1.03 1.09 V
EN/UV Pin Hysteresis 50 mV
EN/UV Pin Current EN/UV = 2V –20 20 nA
PG Upper Threshold from V
FB
FB Rising
l
6 10 13 %
PG Lower Threshold from V
FB
FB Falling
l
–6 –10 –13 %
PG Hysteresis 1 %
PG Leakage PG = 3.3V –100 100 nA
PG Pull-Down Resistance PG = 0.1V 350 Ω
TR/SS Source Current 1 2 3 µA
TR/SS Pull-Down Resistance TR/SS = 0.1V 250 Ω
BIAS Pin Current Consumption V
OUT1
= 3.3V, Load1 = 0.5A, V
OUT2
= 3.3V, Load2 = 0.5A, f
SW
= 1MHz 7 mA
Oscillator Frequency R
T
= 14.7kΩ
R
T
= 37.4kΩ
R
T
= 221kΩ
l
l
l
1.85
900
160
2.05
1000
200
2.25
1100
240
MHz
kHz
kHz
SYNC Threshold SYNC Falling
SYNC Rising
0.4
2.4
V
V
SYNC Pin Current SYNC = 3V –100 100
nA
Channel 1
Minimum V
IN1
Voltage
l
3.0 3.4 V
Supply Current in Regulation V
IN
= 6V, V
OUT1
= 3.3V, Load = 100µA
V
IN
= 6V, V
OUT1
= 3.3V Load = 1mA
80
620
110
910
µA
µA
SW1 Minimum On-Time Load = 0.25A, Pulse-Skipping Mode
l
20 35 55 ns
SW1 Top NMOS On-Resistance 310 mΩ
SW1 Peak Current Limit (Note 3)
l
3.2 4.2 5.2 A
SW1 Bottom NMOS On-Resistance 190 mΩ
SW1 Valley Current Limit
l
1.5 2.0 3.0 A
SW1 Leakage Current V
IN1
= 42V, V
SW1
= 0V, 42V –2 2 µA
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
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