LTC3633 Datasheet, PDF (3/28 Pages) Linear Technology – Dual Channel 3A, 15V Monolithic Synchronous Step-Down Regulator

LTC3633
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T_J = 25°C. V_IN = 12V, INTV_CC = 3.3V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V_IN
Supply Range
l
3.6
15
V
I_Q
Input DC Supply Current (V_IN1 + V_IN2)
Both Channels Active (Note 5)
MODE = 0V
Sleep Current
Shutdown
MODE = INTV_CC, V_FB1, V_FB2 > 0.6
RUN = 0V
1.3
mA
500
μA
13
μA
V_FB
ΔV_{LINE_REG}
ΔV_{LOAD_REG}
I_FB
g_m(EA)
t_ON
t_OFF
f_OSC
Feedback Reference Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
Feedback Pin Input Current
Error Amplifier Transconductance
Minimum On Time
Minimum Off Time
Oscillator Frequency
V_IN = 3.6V to 15V
ITH = 0.8V to 1.6V
ITH = 1.2V
V_ON = 1V, V_IN = 4V
V_IN = 6V
V_RT = INTV_CC
RT = 160k
RT = 80k
l 0.594
0.6
0.606
V
0.02
%/V
0.05
%
±30
nA
1.8
mS
20
ns
40
60
ns
1.4
2
2.6
MHz
1.7
2
2.3
MHz
3.4
4
4.6
MHz
I_LIM
Valley Switch Current Limit
Channel 1 (3A)
Channel 2 (3A)
2.6
3.5
4.5
A
2.6
3.5
4.5
A
R_DS(ON)
Channel 1
Top Switch On-Resistance
Bottom Switch On-Resistance
Channel 2
Top Switch On-Resistance
Bottom Switch On-Resistance
130
mΩ
65
mΩ
130
mΩ
65
mΩ
I_SW(LKG)
Switch Leakage Current
V_IN = 15V, V_RUN = 0V
0.01
±1
μA
V_VIN-OV
V_IN Overvoltage Lockout Threshold
V_IN Rising
V_IN Falling
16.8
17.5
18
V
15.8
16.5
17
V
INTV_CC Voltage
3.6V < V_IN < 15V, 0mA Load
3.1
3.3
3.5
V
INTV_CC Load Regulation
0mA to 50mA Load, V_IN = 4V to 15V
0.7
%
RUN Threshold Rising
RUN Threshold Falling
l 1.18
1.22
1.26
V
l 0.98
1.01
1.04
V
R_PGOOD
t_PGOOD
t_SS
I_TRACKSS
V_PHMODE
RUN Leakage Current
V2P5 Voltage
PGOOD Good-to-Bad Threshold
PGOOD Bad-to-Good Threshold
PGOOD Pull-Down Resistance
Power Good Filter Time
Internal Soft-Start Time
V_FB During Tracking
TRACKSS Pull-Up Current
PHMODE Threshold Voltage
V_IN = 15V
I_LOAD = 0mA to 10mA
V_FB Rising
V_FB Falling
V_FB Falling
V_FB Rising
10mA Load
TRACKSS = 0.3V
PHMODE V_IH
PHMODE V_IL
0
±3
μA
l 2.46
2.5
2.54
V
8
10
%
–8
–10
%
–3
–5
%
3
5
%
15
Ω
20
40
μs
400
700
μs
0.28
0.3
0.315
V
1.4
μA
1
V
0.3
V
3633f
3