ltc3455euf-trpbf Linear Technology Corporation, ltc3455euf-trpbf Datasheet - Page 2

• Manufacturer Part Number: ltc3455euf-trpbf
• Description: Dual Dc/dc Converter With Usb Power Manager And Li-ion Battery Charger
• Manufacturer: Linear Technology Corporation

ABSOLUTE AXI U RATI GS
LTC3455
(Note 1)
Transient (t < 1ms and Duty Cycle < 1%):
Steady State:
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
Burst Mode, Battery Powered
PWM Mode, Battery Powered
USB Powered
Wall Powered
Shutdown
V
V
Pin Quiescent Current (Note 3)
MAX
BAT
= 0V, V
, V
USB Voltages ................................. –0.3V to 7V
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
= 100µA
= 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
= 100µA
= 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.
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
SUSPEND
T
JMAX
USBHP
TIMER
PROG
CHRG
FB1
24-LEAD (4mm × 4mm) PLASTIC QFN
= 125°C, θ
EXPOSED PAD (PIN 25) IS GND
MAX
MUST BE SOLDERED TO PCB
1
2
3
4
5
6
= 3.6V, V
24
7
UF PACKAGE
JA
23 22 21 20 19
8
TOP VIEW
= 36°C/W, θ
9
25
10 11 12
PWRON
http://www.linear.com/leadfree/
JC
= 2.5°C/W
●
●
18
17
16
15
14
13
= 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
ORDER PART
10
10
60
±1
2
LTC3455EUF
MARKING
NUMBER
UF PART
3455
W
ON2
MAX
1.26
0.10
0.35
0.10
0.35
160
800
±30
3.2
1.1
1.0
1.0
1.0
20
20
4
= 0V,
UNITS
3455fb
U
mV
mV
ms
µA
µA
µA
µA
µA
µA
µA
µA
µA
nA
V
V
V
V
V
V
V
V
V
V