LTC3550 Datasheet, PDF (2/24 Pages) Linear Technology – Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter

LTC3550
ABSOLUTE AXI U RATI GS
(Note 1)
DCIN, USBIN.............................................. –0.3V to 10V
EN, ^⎯C^⎯H^⎯R^⎯G, ^⎯P^⎯W^⎯R, HPWR ............................ –0.3V to 10V
BAT, IDC, IUSB, ITERM ................................ –0.3V to 7V
V_CC............................................................... –0.3V to 6V
RUN, V_FB.....................................................–0.3V to V_CC
SW (DC)........................................–0.3V to (V_CC + 0.3V)
DCIN Pin Current (Note 2) ..........................................1A
USBIN Pin Current (Note 2) .................................700mA
BAT Pin Current (Note 2) ............................................1A
P-Channel SW Source Current (DC).....................800mA
N-Channel SW Source Current (DC) ....................800mA
Peak SW Sink and Source Current ...........................1.3A
Operating Temperature Range (Note 3) ... –40°C to 85°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range................... –65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
USBIN 1
IUSB 2
ITERM 3
PWR 4
CHRG 5
V_FB 6
V_CC 7
GND 8
16 DCIN
15 BAT
14 IDC
13 HPWR
17
12 EN
11 RUN
10 SW
9 GND
DHC PACKAGE
16-LEAD (5mm × 3mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 40°C (NOTE 4)
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER DHC PART MARKING
LTC3550EDHC
3550
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_DCIN = 5V, V_USBIN = 5V, V_CC = 3.6V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_DCIN
V_USBIN
V_CC
V_EN
R_EN
V_RUN
I_RUN
V⎯_C⎯_H⎯_R⎯_G
V⎯_P⎯_W⎯_R
V_HPWR
R_HPWR
V_UVDC
Wall Adapter Input Supply Voltage
USB Port Input Supply Voltage
Buck Regulator Input Supply Voltage
EN Input Threshold Voltage
EN Pull-Down Resistance
RUN Threshold Voltage
RUN Leakage Current
⎯_C⎯_H⎯_R⎯_{G Output Low Voltage}
⎯P⎯W⎯R Output Low Voltage
HPWR Input Threshold Voltage
HPWR Pull-Down Resistance
DCIN Undervoltage Lockout Voltage
I⎯_C⎯_H⎯_R⎯_G = 5mA
I⎯_P⎯_W⎯_R = 5mA
From Low to High
Hysteresis
● 4.3
8
V
● 4.3
8
V
● 2.5
5.5
V
0.4
0.7
1.0
V
1.2
2
5
MΩ
● 0.3
1
1.5
V
●
±0.01 ±1
µA
0.35
0.6
V
0.35
0.6
V
0.4
0.7
1
V
●
1
2
5
MΩ
4.0
4.15
4.3
V
200
mV
V_UVUSB
USBIN Undervoltage Lockout Voltage From Low to High
Hysteresis
3.8
3.95
4.1
V
200
mV
V_ASD-DC
V_ASD-USB
V_DCIN – V_BAT Lockout Threshold Voltage
V_USBIN – V_BAT Lockout Threshold
Voltage
V_DCIN from Low to High, V_BAT = 4.2V
V_DCIN from High to Low, V_BAT = 4.2V
V_USBIN from Low to High, V_BAT = 4.2V
V_USBIN from High to Low, V_BAT = 4.2V
140
180
220
mV
20
50
80
mV
140
180
220
mV
20
50
80
mV
3550fa
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