LTC3633A-3_15 Datasheet, PDF (3/28 Pages) Linear Technology – Dual Channel 3A, 20V Monolithic Synchronous Step-Down Regulator

LTC3633A-2/LTC3633A-3
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T_J = 25°C (Note 2). PV_IN1 = PV_IN2 = SV_IN = 12V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP MAX UNITS
SV_IN
Supply Range
l 3.6
20
V
PV_IN1 Supply Range
PV_IN2 Supply Range
3.6V < SV_IN < 20V
l 1.5
l 1.5
20
V
20
V
Output Voltage Range (Note 4)
LTC3633A-2, V_ON = V_OUT
LTC3633A-3, V_ON = V_OUT
0.6
6
V
1.5
12
V
I_Q
Input DC Supply Current (PV_IN1 + PV_IN2 + SV_IN)
Both Channels Active (Note 5)
MODE = 0V
Sleep Current
Shutdown
MODE = INTV_CC, V_FB1, V_FB2 > 0.6
RUN1 = RUN2 = 0V
1.3
mA
500
µA
13
µA
V_FB
Feedback Reference Voltage
l 0.594
0.6 0.606
V
∆V_{LINE_REG}
∆V_{LOAD_REG}
I_FB
g_m(EA)
Reference Voltage Line Regulation
Output Voltage Load Regulation
Feedback Pin Input Current
Error Amplifier Transconductance
PV_IN = 3.6V to 20V
ITH = 0.8V to 1.6V
ITH = 1.2V
0.002
%/V
0.05
%
±30
nA
1.8
mS
t_ON
Minimum On Time
V_ON = 0.6V, PV_IN = 4V
20
ns
t_OFF
Minimum Off Time
PV_IN = 6V
45
ns
f_OSC
Oscillator Frequency
V_RT = INTV_CC
RT = 162k
RT = 80.6k
1.4
2
2.6
MHz
1.7
2
2.3
MHz
3.4
4
4.6
MHz
I_LIM
Positive Valley Switch Current Limit
2.6
3.5
4.5
A
Negative Inductor Valley Current Limit
–2
A
R_DS(ON)
Top Switch On-Resistance
Bottom Switch On-Resistance
130
mΩ
65
mΩ
I_SW(LKG)
V_VIN-OV
Switch Leakage Current
V_IN Overvoltage Lockout Threshold
INTV_CC Voltage
INTV_CC Load Regulation
RUN Threshold Rising
RUN Threshold Falling
PV_IN = 20V, V_RUN = 0V
0.01 ±1
µA
PV_IN Rising
PV_IN Falling
22.5
V
20.3
21.5 22.5
V
3.6V < SV_IN < 20V, 0mA Load
3.1
3.3
3.5
V
0mA to 50mA Load, SV_IN = 4V to 20V
1.3
%
l 1.18
1.22 1.26
V
l 0.98
1.01 1.04
V
RUN Leakage Current
0
±3
µA
R_PGOOD
PGOOD Good-to-Bad Threshold
PGOOD Bad-to-Good Threshold
PGOOD Pull-Down Resistance
V_FB Rising
V_FB Falling
V_FB Rising
V_FB Falling
10mA Load
8
10
%
–8
–10
%
–3
–5
%
3
5
%
20
Ω
t_PGOOD
Power Good Filter Time
20
40
µs
t_SS
I_TRACKSS
Internal Soft-Start Time
V_FB During Tracking
TRACKSS Pull-Up Current
10% to 90% Rise Time
TRACKSS = 0.3V
400 700
µs
0.28
0.3 0.315
V
1.4
µA
For more information www.linear.com/LTC3633A-2
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