LTC4070
16
4070fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
® LINEAR TECHNOLOGY CORPORATION 2010
LT 0411 REV C • PRINTED IN USA
relaTeD parTs
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTS
Shunt Regulators
LT1389 Nanopower Precision Shunt Voltage Reference 800nA Operating Current, 0.05% Initial Accuracy, Low Drift: 10ppm/°C
LT1634 Micropower Precision Shunt Reference 10µA Operating Current, 0.05% Initial Accuracy, Low Drift: 10ppm/°C
Switching Regulators
LTC3588-1 Piezoelectric Energy Harvesting Power Supply
in 3mm × 3mm DFN and MSOP Packages
High Efficiency Hysteretic Integrated Buck DC/DC; 950nA Input Quiescent Current
(Output in Regulation—No Load), 520nA Input Quiescent Current in UVLO, 2.6V to
19.2V Input Operating Range; Integrated Low-Loss Full-Wave Bridge Rectifier, Up to
100mA of Output Current, Selectable Output Voltages of 1.8V, 2.5V, 3.3V, 3.6V
LTC3620 Ultralow Power 15mA Step-Down Switching
Regulator in 2mm × 2mm DFN
High Efficiency; Up to 95%, Maximum Current Output: 15mA, Externally
Programmable Frequency Clamp with Internal 50kHz Default Minimizes Audio Noise,
18µA I
Q
Current, 2.9V to 5.5 Input Voltage Range, Low-Battery Detection
LTC3642 High Efficiency High Voltage 50mA
Synchronous Step-Down Converter in
3mm × 3mm DFN and MSE Packages
Wide Input Voltage Range: 4.5V to 45V; Tolerant of 60V Input Transients, Internal
High Side and Low Side Power Switches; No Compensation Required, 50mA Output
Current, Low Dropout Operation: 100% Duty Cycle, Low Quiescent Current, 12µA
Battery Chargers
LTC1734L Lithium-Ion Linear Battery Charger in ThinSOT Low Current Version of LTC1734, 50mA ≤ I
CHRG
≤ 180mA
LTC4054L Standalone Linear Li-Ion Battery Charger in
ThinSOT
Low Current Version of LTC4054, 10mA ≤ I
CHRG
≤ 150mA. Thermal Regulation
Prevents Overheating, C/10 Termination, with Integrated Pass Transistor
LTC4065L Standalone 250mA Li-Ion Battery Charger in
2mm × 2mm DFN
Low Current Version of LTC4065, 15mA ≤ I
CHRG
≤ 250mA, 4.2V, ±0.6% Float Voltage,
High Charge Current Accuracy: 5%
LTC4071 Li-Ion/Polymer Shunt Battery Charger System
with Low Battery Disconnect
Charger Plus Pack Protection in One IC Low Operating Current (550nA), 50mA
Internal Shunt Current, Pin Selectable Float Voltages (4.0V, 4.1V, 4.2V), 8-lead,
2mm × 3mm, DFN and MSOP Packages
Figure 9. 12V Wall Adapter Charging with 205mA with
Automatic Load Disconnect on Low Battery
4070 TA02
LTC4070
12V
ADJ
HBO
R
IN
41.2Ω
2W
R
NTC
: NTHS0402N02N1002F 10k
GND
FLOAT
SYSTEM
STATUS
T
R
NOM
10k
Li-Ion
NTCBIAS
NTC
DRV
LBO
V
CC
R
LED
2.67k
D1
LTST
C190KGKT
+
Q1: FDN352AP
Q2: FDR8508
