LTC3441 Linear Technology, LTC3441 Datasheet - Page 2

• Manufacturer Part Number: LTC3441
• Description: Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
• Manufacturer: Linear Technology

ABSOLUTE AXI U RATI GS
LTC3455
(Note 1)
V
SW1, SW2 Voltages ....................– 0.3V to (V
TIMER Voltage ............................. – 0.3V to (V
PWRON, ON, ON2, HSON Voltages .............– 0.3V to 6V
PBSTAT, RST, CHRG, AO Voltages ..............– 0.3V to 6V
HSI, HSO Voltages .......................................– 0.3V to 6V
MODE, USBHP, SUSPEND Voltages ............– 0.3V to 6V
WALLFB, AI, PROG Voltages .......................– 0.3V to 2V
FB1, FB2 Voltages ........................................– 0.3V to 2V
Junction Temperature ........................................... 125 C
Operating Temperature Range (Note 2) .. – 40 C to 85 C
Storage Temperature Range ................. – 65 C to 125 C
temperature range, otherwise specifications are at T
V
PARAMETER
Battery Undervoltage Lockout Voltage
Battery Undervoltage Lockout Hysteresis
V
ON Pin Threshold
PWRON Pin Threshold
ON2 Pin Threshold
MODE Pin Threshold
WALLFB Pin Threshold Voltage
WALLFB Pin Hysteresis
ON Pin Pullup Current
PWRON Pin Pulldown Current
ON2 Pin Pulldown Current
MODE Pin Pullup Current
WALLFB Pin Input Bias Current
PBSTAT Pin Low Voltage
RST Pin Low Voltage
RST Pulse Duration
2
ELECTRICAL CHARACTERISTICS
BAT
USB
BAT
Burst Mode, Battery Powered
PWM Mode, Battery Powered
USB Powered
Wall Powered
Shutdown
Pin Quiescent Current (Note 3)
, V
= 0V, V
MAX
WALLFB
, USB Voltages ...........................– 0.3V to 6V
= 0V unless otherwise noted.
W
W W
CONDITIONS
V
V
V
V
V
V
WALLFB Rising
V
V
V
V
V
V
V
I
I
After FB1 and FB2 in Regulation
RST
RST
BAT
ON2
ON2
USB
WALL
PWRON
ON
PWRON
ON2
MODE
WALLFB
ON
ON
= 1V
= 0V, I
= 0V, I
= 100 A
= 1mA
Rising
= V
= 1V, V
= 5V, Charger Off
= 1V
= 1.5V, V
= 1V
= 0V, V
= 1V
MODE
= 1.35V
PBSTAT
PBSTAT
MODE
U
= 1V, Not Switching
MAX
A
MAX
MAX
MAX
= 25 C. V
= 100 A
= 1mA
= 0V, Not Switching
= 0V
= 4.5V, Charger Off
+0.3V)
+0.3V)
The
BAT
denotes the specifications which apply over the full operating
= 3.6V, V
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
SUSPEND
T
USBHP
TIMER
PROG
CHRG
JMAX
FB1
MAX
24-LEAD (4mm 4mm) PLASTIC QFN
= 125 C,
EXPOSED PAD (PIN 25) IS GND
MUST BE SOLDERED TO PCB
1
2
3
4
5
6
= 3.6V, V
24
7
23 22 21 20 19
8
UF PACKAGE
JA
TOP VIEW
9
= 36 C/W,
25
10 11 12
PWRON
JC
18
17
16
15
14
13
= 2.5 C/W
= 2V, V
FB2
AO
AI
HSON
HSO
HSI
1.20
MIN
2.9
ON
U
is open, V
1.23
0.02
0.20
0.02
0.20
TYP
450
110
500
200
3.0
0.8
0.8
0.8
0.8
2.5
2.5
2.5
2.5
10
10
60
2
1
ORDER PART
LTC3455EUF
MARKING
NUMBER
UF PART
W
ON2
3455
MAX
1.26
0.10
0.35
0.10
0.35
160
800
3.2
1.0
1.0
1.0
1.0
20
20
4
30
= 0V,
UNITS
U
3455f
mV
mV
ms
nA
V
V
V
V
A
A
A
A
A
V
V
V
V
A
A
A
A
V
V