LTC3576-1_15 Datasheet, PDF (3/48 Pages) Linear Technology – Switching Power Manager with USB On-the-Go Triple Step-Down DC/DCs

LTC3576/LTC3576-1
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, DV_CC = 3.3V, R_CLPROG = 3.01k, unless
otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
h_CLPROG
(Note 4)
Ratio of Measured V_BUS Current to
CLPROG Program Current
1× Mode
5× Mode
10× Mode
Low Power Suspend Mode
High Power Suspend Mode
210
mA/mA
1160
mA/mA
2200
mA/mA
9.6
mA/mA
56
mA/mA
I_{VOUT(POWERPATH)} V_OUT Current Available Before
Discharging Battery
V_CLPROG
CLPROG Servo Voltage in Current Limit
1× Mode, BAT = 3.3V
5× Mode, BAT = 3.3V
10× Mode, BAT = 3.3V
Low Power Suspend Mode
High Power Suspend Mode
Switching Modes
Suspend Modes
121
mA
667
mA
1217
mA
0.26
0.31
0.41
mA
1.6
2
2.4
mA
1.18
V
100
mV
V_UVLO
V_BUS Undervoltage Lockout
Rising Threshold
Falling Threshold
4.30
4.35
V
3.95
4.00
V
V_DUVLO
V_BUS to BAT Differential Undervoltage
Lockout
Rising Threshold
Falling Threshold
200
mV
50
mV
V_OUT
V_OUT Voltage
f_OSC
R_{PMOS_}
POWERPATH
R_{NMOS_}
POWERPATH
I_{PEAK_POWERPATH}
Switching Frequency
PMOS On-Resistance
NMOS On-Resistance
Peak Inductor Current Limit
1×, 5×, 10× Modes, 0V < BAT < 4.2V,
I_VOUT = 0mA, Battery Charger Off
3.4 BAT + 0.3 4.7
V
USB Suspend Modes, I_VOUT = 250μA
4.5
4.6
4.7
V
1.8
2.25
2.7
MHz
0.18
Ω
0.30
Ω
1× Mode (Note 5)
5× Mode (Note 5)
10× Mode (Note 5)
1
A
2
A
3
A
R_SUSP
Suspend LDO Output Resistance
Closed Loop
PowerPath Switching Regulator—Step-Up Mode (USB On-the-Go)
10
Ω
V_BUS
Output Voltage
0mA ≤ I_VBUS ≤ 500mA, V_OUT > 3.2V
4.75
5.25
V
V_OUT
Input Voltage
2.9
5.5
V
I_VBUS
Output Current Limit
l 550
680
mA
I_PEAK
Peak Inductor Current Limit
(Note 5)
1.8
A
I_OTGQ
V_OUT Quiescent Current
V_OUT = 3.8V, I_VBUS = 0mA (Note 6)
1.38
mA
V_CLPROG
Output Current Limit Servo Voltage
1.15
V
V_OUT(UVLO)
V_OUT UVLO—V_OUT Falling
V_OUT UVLO—V_OUT Rising
2.5
2.6
V
2.8
2.9
V
t_SCFAULT
Short-Circuit Fault Delay
V_BUS < 4V and PMOS Switch Off
7.2
ms
Bat-Track Switching Regulator Control
V_WALL
ΔV_WALL
V_OUT
I_WALLQ
R_ACPR
V_HACPR
V_LACPR
Absolute WALL Input Threshold
Differential WALL Input Threshold
Regulation Target Under V_C Control
WALL Quiescent Current
ACPR Pull-Down Strength
ACPR High Voltage
ACPR Low Voltage
Rising Threshold
Hysteresis
WALL-BAT Falling
Hysteresis
4.2
4.3
4.4
V
1.1
V
0
30
45
mV
60
mV
3.55 BAT + 0.3
V
400
μA
150
Ω
V_OUT
V
0
V
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