LTC4008EGN Linear Technology, LTC4008EGN Datasheet - Page 24

• Manufacturer Part Number: LTC4008EGN
• Description: IC BATT CHARGER CTRLR 4A 20SSOP
• Manufacturer: Linear Technology

Specifications of LTC4008EGN

• Function: Charge Management
• Battery Type: Multi-Chemistry
• Voltage - Supply: 6 V ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP (0.154", 3.91mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LTC4008
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER DESCRIPTION
LT
LT1513
LT1571
LTC1628-PG
LTC1709 Family 2-Phase, Dual Synchronous Step-Down Controller
LTC1729
LT1769
LTC1778
LTC1960
LTC3711
LTC4006
LTC4007
LTC4100
24
THERMISTOR
®
1511
NTC
10k
0V TO 20V
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
V
FAULT
LOGIC
DCIN
FLAG
ACP
I
CL
3A Constant-Current/Constant-Voltage Battery Charger
Sepic Constant- or Programmable-Current/Constant-
Voltage Battery Charger
1.5A Switching Charger
2-Phase, Dual Synchronous Step-Down Controller
with VID
Li-Ion Battery Charger Termination Controller
2A Switching Battery Charger
Wide Operating Range, No R
Step-Down Controller
Dual Battery Charger/Selector with SPI Interface
No R
with VID
Small, High Effi ciency, Fixed Voltage, Lithium-Ion
Battery Charger with Termination
High Effi ciency, Programmable Voltage
Battery Charger with Termination
Smart Battery Charger Controller
C7
0.47μF
SENSE
R11
100k
●
0.25%
Synchronous Step-Down Controller
FAX: [phone]
RT
150k
13.3k
R12
100k
R9
R10 32.4k 1%
0.25%
147k
R8
R7
6.04k
1%
C6
0.12μF
SENSE
●
BATMON
V
I
ACP/SHDN
FAULT
FLAG
NTC
R
I
GND
CL
TH
www.linear.com
™ Synchronous
FB
T
LTC4008
BGATE
TGATE
INFET
PGND
PROG
NiMH/4A Battery Charger
DCIN
CLN
CSP
CLP
BAT
C1
0.1μF
COMMENTS
High Effi ciency, Minimum External Components to Fast Charge Lithium,
NIMH and NiCd Batteries
Charger Input Voltage May be Higher, Equal to or Lower Than Battery Voltage,
500kHz Switching Frequency
1- or 2-Cell Li-Ion, 500kHz or 200kHz Switching Frequency, Termination Flag
Minimizes C
Up to 42A Output, Minimum C
Intel and AMD Processors
Trickle Charge Preconditioning, Temperature Charge Qualifi cation, Time or
Charge Current Termination, Automatic Charger and Battery Detection, and
Status Output
Constant-Current/Constant-Voltage Switching Regulator, Input Current
Limiting Maximizes Charge Current
2% to 90% Duty Cycle at 200kHz, Stable with Ceramic C
Simultaneous Charge or Discharge of Two Batteries, DAC Programmable
Current and Voltage, Input Current Limiting Maximizes Charge Current
3.5V ≤ V
Processors
Complete Charger for 3- or 4-Cell Li-Ion Batteries, AC Adapter Current Limit
and Thermistor Sensor, 16-Pin Narrow SSOP Package
Complete Charger for 3- or 4-Cell Li-Ion Batteries, AC Adapter Current Limit,
Thermistor Sensor and Indicator Outputs
SMBus Rev 1.1 Compliant
INPUT SWITCH
Q3
R4 3.01k 1%
IN
C5
0.0047μF
≤ 36V, 0.925V ≤ V
IN
26.7k
R1 4.99k 1%
and C
1%
R6
R5 3.01k 1%
C4
0.1μF
OUT
, Power Good Output, 3.5V ≤ V
Q1
Q2
R
0.02Ω
1%
4008 TA02
CL
OUT
IN
20μF
D1: MBRS130T3
Q1: Si4431BDY
Q2: FDC645N
C2
and C
≤ 2V, for Transmeta, AMD and Intel Mobile
D1
OUT
10μH
© LINEAR TECHNOLOGY CORPORATION 2003
L1
, Uses Smallest Components for
R
0.025Ω
SYSTEM
LOAD
SENSE
1%
LT 0710 REV B • PRINTED IN USA
IN
OUT
≤ 36V
C3
20μF
CHARGING
CURRENT
MONITOR
NiMH
BATTERY
PACK
4008fb