LTC3552 Datasheet, PDF (2/24 Pages) Linear Technology – Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter

LTC3552
ABSOLUTE AXI U RATI GS
(Note 1)
Charger Input Supply (V_IN) ........................ –0.3V to 10V
PROG, ITERM .................................. –0.3V to V_IN + 0.3V
BAT .............................................................. –0.3V to 7V
⎯C⎯H⎯R⎯G, ⎯P⎯W⎯R, ⎯E⎯N......................................... –0.3V to 10V
BAT Short-Circuit Duration............................Continuous
BAT Pin Current ..........................................................1A
PROG Pin Current ....................................................1mA
Converter Input Supply (V_CC)....................... –0.3V to 6V
V_FB1, V_FB2, RUN1, RUN2...................–0.3V to V_CC +0.3V
MODE/SYNC ....................................–0.3V to V_CC + 0.3V
SW1, SW2 .......................................–0.3V to V_CC + 0.3V
⎯P⎯O⎯R ............................................................. –0.3V to 6V
Ambient Operating Temperature
Range (Note 2) .................................... –40°C to 85°C
Maximum Junction Temperature (Note 8) ............ 125°C
Storage Temperature Range................... –65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
ITERM 1
BAT 2
CHRG 3
MODE/SYNC 4
SW2 5
POR 6
RUN2 7
V_FB2 8
16 EN
15 PWR
14 V_IN
13 PROG
17
12 SW1
11 V_CC
10 RUN1
9 V_FB1
DHC PACKAGE
16-LEAD (5mm × 3mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 40°C/W (Note 3)
EXPOSED PAD IS GROUND (PIN 17)
MUST BE SOLDERED TO PCB
ORDER PART NUMBER DHC PART MARKING
LTC3552EDHC
3552
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_IN = 5V, V_CC = 3.6V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Battery Charger
V_IN
I_IN
V_FLOAT
I_BAT
I_TRIKL
V_TRIKL
V_TRHYS
V_UV
V_UVHYS
Input Supply Voltage
● 4.25
8
V
Input Supply Current
Charge Mode (Note 4)
Standby Mode
Shutdown Mode
R_PROG = 10k
●
Charge Terminated
●
⎯E⎯N = 5V, V_IN < V_BAT or V_IN < V_UV
●
0.4
1
mA
200 500
µA
25
50
µA
Regulated Output (Float) Voltage
0°C ≤ T_A ≤ 85°C, 4.3V < V_IN < 8V
4.158 4.2 4.242
V
BAT Pin Current
R_PROG = 10k, Current Mode
● 92
100
105
mA
R_PROG = 2k, Current Mode
● 465
500
535
mA
Standby Mode, V_BAT = 4.2V
●
–2.5
–6
µA
Shutdown Mode (^⎯E^⎯N = 5V, V_IN < V_BAT or
±1
±2
µA
V_IN < V_UV)
Sleep Mode, V_IN = 0V
±1
±2
µA
Trickle Charge Current
V_BAT < V_TRIKL, R_PROG = 2k
● 30
45
60
mA
Trickle Charge Threshold Voltage
R_PROG = 10k, V_BAT Rising
2.8
2.9
3
V
Trickle Charge Hysterisis Voltage
R_PROG = 10k
80
mV
V_IN Undervoltage Lockout Voltage
From V_IN Low to High
● 3.7
3.8 3.92
V
V_IN Undervoltage Lockout Hysteresis
● 150
200
300
mV
3552f
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