ltc4001 Linear Technology Corporation, ltc4001 Datasheet - Page 2

• Manufacturer Part Number: ltc4001
• Description: 2a Synchronous Buck Li-ion Charger
• Manufacturer: Linear Technology Corporation

ABSOLUTE AXI U RATI GS
(Note 1)
LTC4001
PV
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
The
V
SYMBOL PARAMETER
V
I
V
I
I
V
V
∆V
V
f
D
R
R
ELECTRICAL CHARACTERISTICS
2
IN
BAT
TRIKL
OSC
IN
FLOAT
TRIKL
UVL
ASD
IN
PFET
NFET
UVL
t < 1ms, DC < 1% .................................... –0.3V to 7V
Steady State ............................................ –0.3V to 6V
IN
= 5V, V
●
, V
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
INSENSE
Supply Voltage
V
Current Mode Charge Current
Trickle Charge Current
Trickle Charge Threshold
V
V
Automatic Shutdown Threshold
Voltage
Oscillator Frequency
Maximum Duty Factor
R
R
EN
BAT
IN
IN
DS(ON)
DS(ON)
Undervoltage Lockout Hysteresis Measured from V
Undervoltage Lockout Voltage
= 0V, R
Regulated Float Voltage
of P-Channel MOSFET
of N-Channel MOSFET
W
PROG
= 549Ω, R
W W
IDET
= 549Ω, unless otherwise specified.
CONDITIONS
(Note 2)
PV
Pins Open, Charger On
Shutdown, EN = V
Measured from BATSENS to GNDSENS
R
R
Shutdown, EN = V
V
V
V
V
V
V
Measured from PV
Measured from SW to PGND
BAT
BAT
BAT
IN
INSENSE
INSENSE
PROG
PROG
IN
Rising, Measured from V
Connected to V
= 2V
Rising
Falling
= 549Ω, V
= 1.10k, V
U
– V
– V
BATSENS
BATSENS
BAT
BAT
INSENSE
IN
IN
IN
INSENSE
= 3.5V
Rising (Turn-On), V
Falling (Turn-Off), V
= 3.5V
to SW
to GNDSENS
, PROG and IDET
INSENSE
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:
ORDER PART NUMBER
to GNDSENS
LTC4001EUF
BATSENSE
BATSENSE
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
GNDSENS
SENSE
= 4V
= 4V
PGND
16-LEAD (4mm × 4mm) PLASTIC QFN
BAT
http://www.linear.com/leadfree/
T
JMAX
1
2
3
4
●
16 15 14 13
= 125°C, θ
5
UF PACKAGE
TOP VIEW
4.158
4.179
6
3.05
2.85
MIN
200
1.8
0.9
2.7
1.3
17
35
15
4
7
JA
= 37°C/W
U
8
UF PART MARKING
12
11
10
9
TYP
100
250
127
121
4.2
4.2
3.1
3.0
1.5
50
30
2
1
PROG
NTC
FAULT
V
INSENSE
A
4001
W
= 25°C.
4.242
4.221
MAX
3.20
3.05
2.82
300
100
5.5
2.2
1.1
1.7
50
±5
65
60
2
UNITS
U
MHz
4001f
mΩ
mΩ
mA
mA
mV
mV
mV
µA
µA
%
V
V
V
A
A
V
V
V