LTC3455
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
BAT
= 3.6V, V
MAX
= 3.6V, V
PWRON
= 2V, V
ON
is open, V
ON2
= 0V,
V
USB
= 0V, V
WALLFB
= 0V unless otherwise noted.
PARAMETER
Battery-V
MAX
PMOS
V
MAX
PMOS Switch On-Resistance
V
MAX
Switch Current Limit
V
MAX
Switch Current Limit at Startup
Gain Block
AI Pin Threshold Voltage
AI Pin/FB2 Pin Voltage Difference
AI Pin Input Bias Current
AO Pin Sink Current
AO Pin Voltage
Switching Regulators
FB1, FB2 Voltage
FB1, FB2 Voltage Line Regulation
FB1, FB2 Voltage Burst Mode Hysteresis
FB1, FB2 Pin Input Bias Current
Switching Frequency
PMOS Switch On-Resistance
NMOS Switch On-Resistance
PMOS Switch Current Limit
USB Power Manager
USB Undervoltage Lockout Voltage
USB Undervoltage Lockout Hysteresis
USB Minimum Voltage to Charge Battery
USB PMOS Switch On-Resistance
USB Current Limit
USB Suspend Mode Bias Current
SUSPEND Pin Threshold
USBHP Pin Threshold
SUSPEND Pin Pulldown Current
USBHP Pin Pulldown Current
Hot Swap Output
Hot Swap PMOS Switch On-Resistance
Hot Swap PMOS Switch Current Limit
HSON Pin Threshold
HSON Pin Pulldown Current
V
HSI
= 3.3V
V
HSI
= 3.3V, V
HSO
= 2.5V
120
0.9
160
0.8
2.5
1.1
Ω
mA
V
µA
V
SUSPEND
= 0.5V
V
USBHP
= 0.5V
V
USB
= 5V
V
USB
= 5V, V
USBHP
= 2V
V
USB
= 5V, V
USBHP
= 0V
V
USB
= 5V, V
SUSPEND
= 2V
q
q
q
q
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
TYP
0.15
MAX
UNITS
Ω
A
A
2.5
With V
MAX
Rising, V
MAX
= 3V, V
BAT
= 3.6V
0.4
0.784
–8
q
4.0
0.9
0.805
0
±1
1.8
0.8
0.826
8
±25
2.5
1.2
0.826
V
mV
nA
mA
V
V
%/V
mV
V
FB2
– V
AI
V
AI
= 0.85V
V
AI
= 0.6V, V
AO
= 1.5V
V
AI
= 0.6V, I
AO
= 1mA
1.0
0.784
0.805
0.01
8
V
MAX
= 3V to 5V
V
MODE
= 2V
V
FB1
= V
FB2
= 0.85V
Both Switchers
Both Switchers
Both Switchers
Switcher 1
Switcher 2
From Low to High
450
700
3.75
q
±1
1.2
1.5
0.35
0.45
600
900
3.90
150
4.0
0.5
440
60
475
80
4
0.8
0.8
2.5
2.5
±25
1.8
nA
MHz
Ω
Ω
850
1200
4.10
mA
mA
V
mV
V
Ω
500
100
20
1.1
1.1
mA
mA
µA
V
V
µA
µA
3455f
3
LINER [ LINEAR TECHNOLOGY ]
