LTC4001-1_15 Datasheet, PDF (2/20 Pages) Linear Technology – 2A Synchronous Buck Li-Ion Charger

LTC4001-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PV_IN, V_INSENSE
t < 1ms, DC < 1% .................................... –0.3V to 7V
Steady State............................................. –0.3V to 6V
SW, SENSE, BAT, BATSENS, SS, FAULT, CHRG, EN, NTC,
PROG, IDET, TIMER Voltage........................ – 0.3V to 6V
Operating Temperature Range (Note 3) .. –40°C to 85°C
Operating Junction Temperature
(Note 5) ................................................ –40°C to 125°C
Storage Temperature Range.................. –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
16 15 14 13
BAT 1
12 PROG
SENSE 2
11 NTC
17
PGND 3
10 FAULT
GNDSENS 4
9 V_INSENSE
5678
UF PACKAGE
16-LEAD (4mm × 4mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 37°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC4001EUF-1#PBF
LTC4001EUF-1#TRPBF 40011
16-Lead (4mm × 4mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 5V, V_EN = 0V, R_PROG = 549Ω, R_IDET = 549Ω, unless otherwise
specified.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
V_IN
Supply Voltage
I_IN
V_FLOAT V_BAT Regulated Float Voltage
(Note 2)
PV_IN Connected to V_INSENSE, PROG and IDET
Pins Open, Charger On
Shutdown, EN = V_IN
Measured from BATSENS to GNDSENS
4
5.5
V
2
mA
50
μA
● 4.059
4.1
4.141
V
4.079
4.1
4.121
V
I_BAT
I_TRIKL
V_TRIKL
V_UVL
ΔV_UVL
Current Mode Charge Current
Trickle Charge Current
Trickle Charge Threshold
V_IN Undervoltage Lockout Voltage
V_IN Undervoltage Lockout
Hysteresis
R_PROG = 549Ω, V_BAT = 3.5V
SRh^Pu^ROtd^Go=wn1,.1E⁰N^{k,=VVBIANT = 3.5V}
V_BAT = 2V
V_BAT Rising
V_BAT Falling
V_IN Rising, Measured from V_INSENSE to GNDSENS
Measured from V_INSENSE to GNDSENS
1.8
2
2.2
A
0.9
1
1.1
A
±5
μA
35
50
65
mA
3.05
3.1
3.20
V
2.85
3.0
3.05
V
2.7
2.82
V
100
mV
V_ASD
Automatic Shutdown Threshold V_INSENSE – V_BATSENS Rising (Turn-On), V_BATSENSE = 4V
200
250
300
mV
Voltage
V_INSENSE – V_BATSENS Falling (Turn-Off), V_BATSENSE = 4V
15
30
60
mV
40011fa
2