LTC3586-2 Datasheet, PDF (5/36 Pages) –

LTC3586-2/LTC3586-3
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_BUS = 5V, BAT = 3.8V, V_IN1 = V_IN2 = V_IN3 = V_IN4 = V_OUT3 = 3.8V,
V_OUT4 = 5V, R_PROG = 1k, R_CLPROG = 3.01k, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
Switching Regulators 1, 2, 3 and 4
V_{IN1, 2, 3, 4}
V_OUTUVLO
Input Supply Voltage
V_OUT UVLO—V_OUT Falling
V_OUT UVLO—V_OUT Rising
V_IN1,2,3,4 Connected to V_OUT Through
Low Impedance. Switching Regulators
are Disabled in UVLO
2.7
5.5
2.5 2.6
2.8
2.9
f_OSC
Oscillator Frequency
I_{FB1, 2, 3, 4}
FBx Input Current
V_{FB1, 2, 3, 4}
V_FBx Servo Voltage
Switching Regulators 1 and 2 (Buck)
V_FB1,2,3,4 = 0.85V
1.8 2.25 2.7
– 50
50
l 0.78 0.80 0.82
I_VIN1,2
Pulse-Skipping Mode Input Current
Burst Mode^® Input Current
Shutdown Input Current
I_LIM1,2
PMOS Switch Current Limit
R_P1,2
PMOS R_DS(ON)
R_N1,2
NMOS R_DS(ON)
D_1,2
Maximum Duty Cycle
R_SW1,2
SW1,2 Pull-Down in Shutdown
Switching Regulator 3 (Buck-Boost)
I_VOUT1,2 = 0µA, (Note 7)
I_VOUT1,2 = 0µA, (Note 7)
I_VOUT1,2 = 0µA, (Note 7)
Pulse-Skipping/Burst Mode Operation (Note 5)
225
35
60
1
600 800 1100
0.6
0.7
100
10
I_VIN3
Input Current
PWM Mode, I_VOUT3 = 0µA
Burst Mode Operation, I_VOUT3 = 0µA
Shutdown
220 400
13
20
0
1
V_OUT3(LOW)
V_OUT3(HIGH)
I_LIMF3
I_PEAK3(BURST)
I_ZERO3(BURST)
I_MAX3(BURST)
Minimum Regulated Output Voltage For Burst Mode Operation or PWM Mode
Maximum Regulated Output Voltage
Forward Current Limit (Switch A)
PWM Mode (Note 5)
Forward Burst Current Limit (Switch A) Burst Mode Operation
Reverse Burst Current Limit (Switch D) Burst Mode Operation
Maximum Deliverable Output Current in 2.7V ≤ V_IN3 ≤ 5.5V, 2.75V ≤ V_OUT3 ≤ 5.5V
Burst Mode Operation
(Note 8)
2.65 2.75
5.5 5.6
l2
2.5
3
l 200 275 350
l –30
0
30
50
R_DS(ON)P
R_DS(ON)N
I_LEAK(P)
I_LEAK(N)
R_VOUT3
D_BUCK(MAX)
D_BOOST(MAX)
t_SS3
PMOS R_DS(ON)
NMOS R_DS(ON)
PMOS Switch Leakage
NMOS Switch Leakage
V_OUT3 Pull-Down in Shutdown
Maximum Buck Duty Cycle
Maximum Boost Duty Cycle
Soft-Start Time
Switches A, D
Switches B, C
Switches A, D
Switches B, C
PWM Mode
PWM Mode
0.22
0.17
–1
1
–1
1
10
l 100
75
0.5
UNITS
V
V
V
MHz
nA
V
µA
µA
µA
mA
Ω
Ω
%
kΩ
µA
µA
µA
V
V
A
mA
mA
mA
Ω
Ω
µA
µA
kΩ
%
%
ms
358623f
5