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Linear Technology Chronicle 1

www.linear.com.cn

Chinese Edition (Simplified)

Linear Technology ChronicleVol. 12 No. 2

LTC LT PowerPath ThinSOT

•

•

•

• USB

•

•

…

ICHARGE

LTC4008

ACP/SHDN

FAULT

FLAG

NTC

LTC4054BAT

PROG

2 Linear Technology Chronicle

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LTC4054 ThinSOT

. . .

1.

•

•

2. PROG

•

•

•

0.6%

VCC

1.65k

4.2VLi-IonBATTERY

LTC4054-4.2

1µF

VIN4.5V TO 5.25V

BAT

43

5

2

PROG

GND

600mA

Pass TargetedCharge Input Element Ambient Battery

Part Charger Current Voltage Microcontroller Internal/ Charge Temperature Capacities,Number Type (A) (V) Needed? External Termination Monitor? Package mAh*

LTC1734L Linear 0.05 to 0.18 4.55 to 8 Yes Ext µC Required — SOT-23-6 Up to 450

LTC4056 Linear 0.2 to 0.7 4.5 to 6.5 No Ext Timer — SOT-23-8 Up to 1,700

LTC1734 Linear 0.2 to 0.7 4.55 to 8 Yes Ext µC Required — SOT-23-6 Up to 1,700

LTC4054 Linear to 0.8 4.25 to 6.5 No Int C/10 — SOT-23-5 Up to 2,000

LTC4050 Linear to 1 4.5 to 12 No Ext Timer Yes MSOP-10 Up to 2,500

LTC1730 Pulse to 1 4.5 to 12 No Ext Timer Yes SSOP-16 Up to 2,500

LTC1731 Linear to 1 4.5 to 12 No Ext Timer — MSOP-8 Up to 2,500

LTC1732 Linear to 1 4.5 to 12 No Ext Timer — MSOP-10 Up to 2,500

LTC4053 Linear 1.25 (Wall Cube), 4.25 to 6.5 No Int Timer Yes MSOP-10 Up to 3,0000.1 to 0.5 (USB)

LTC1733 Linear 0.5 to 1.5 4.5 to 6.5 No Int Timer Yes MSOP-10 Up to 3,750

LT1571-5 Switcher to 1.5 6.2 to 28 Yes Int C/5 Flag, — SSOP-16 Up to 3,750(500kHz) µC Required

LTC4052 Pulse to 2 4.5 to 12 No Int Timer — MSOP-8 Up to 5,000* 0.4C 1C

LTC4054 LTC4054

ThinSOTTM

• 800mA

•

• C/10

•

• PROG


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2A

DCIN

CHG

ACP/SHDN

IMON

NTC

RT

ITH

GND

CHG

ACP

INFET

CLP

CLN

TGATE

BGATE

PGND

CSP

BAT

LTC4006

0.12µF

THERMISTOR10kNTC

309kTIMING

RESISTOR(~2 HOURS)

0.0047µF0.47µF

32.4kCHARGING

CURRENT MONITOR

100k

VLOGIC

DCIN0V TO 20V

2.5A

6.04k

0.1µF

INPUT SWITCH

15nF

20µFTO LOAD

22µH 2A

5k

RSENSE0.05Ω

0.04Ω

20µF

BATTERY

LTC4006

95%

•

•

• 4A

•

• 3.9V

Pass TargetedCharge Input Element Battery

Part Charger Current Voltage Number of Microcontroller Internal/ Charge Capacities,Number Type (A) (V) Cells Needed? External Termination Package mAh*

LTC1731 Linear to 1 4.5 to 12 1 to 2 No Ext Timer MSOP-8 Up to 2,500

LTC1732 Linear to 1 4.5 to 12 1 to 2 No Ext Timer MSOP-10 Up to 2,500

LT®1510-5 Switcher to 1 6.2 to 29 1 to 4 Yes Int µC Required SO-8, SO-16, Up to 2,500(500kHz) SSOP-16

LT1571 Switcher to 1.5 6.2 to 28 1 to 4 Yes Int µC Required SSOP-28 Up to 3,000(200kHz)

LT1511 Switcher to 3 6 to 28 1 to 4 Yes Int µC Required SO-24 Up to 7,500(200kHz)

LTC4006 Sync to 4 6 to 28 2 to 4 No Ext Timer SSOP-16 Up to 10,000SwitcherController

LTC4007 Sync to 4 6 to 28 3 to 4 No Ext Timer, Temp SSOP-24 Up to 10,000SwitcherController

LTC4008 Sync to 4 6 to 28 2 to 6 Yes Ext µC Required SSOP-20 Up to 10,000SwitcherController

* 0.4C 1C


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NiMH NiCd

N i M H

NiCd

LTC4008

NiCd NiMH

BATMON

VFB

ICL

ACP/SHDN

FAULT

FLAG

NTC

RT

ITH

GND

ICL

ACP

FAULT

FLAG

DCIN

INFET

CLP

CLN

TGATE

BGATE

PGND

CSP

BAT

PROG

LTC4008

THERMISTOR10kNTC

VLOGIC

INPUT0V TO 20V

STATUS SIGNALS FORMICROPROCESSOR

INPUT SWITCHPROVIDES HIGHER EFFICIENCY

THAN A DIODE

20µF

10µH 0.025Ω

0.02Ω

20µF

SYSTEMLOAD

NiMHBATTERYPACK

PATENTEDCHARGINGCURRENTMONITOR

CURRENT LIMIT ENSURESWALL ADAPTER IS NOTOVERLOADED

CHARGE TERMINATION TIMER SET WITH A LOW COST RESISTOR

SETS UPPER ANDLOWER TEMPERATURE

LIMITS FOR SAFE CHARGING

4A NiMH

• 4A

•

• SSOP-20

•

NiCd NiMHPass Targeted

Charge Input Element BatteryPart Charger Current Voltage Number of Internal/ Charge Capacities,Number Type (A) (V) Cells External Termination Package mAh*

LTC1734 Linear 0.2 to 0.7 4.55 to 8 4 Ext µC Required SOT-23-6 Up to 1,700

LTC1734L Linear 0.05 to 0.18 4.55 to 8 4 Ext µC Required SOT-23-6 Up to 450

LTC1731 Linear to 1 4.5 to 12 6 Ext µC Required MSOP-8 Up to 2,500

LTC1732 Linear to 1 4.5 to 12 6 Ext µC Required MSOP-10 Up to 2,500

LT1510-5 Switcher to 1 6.2 to 29 18 Int µC Required SO-8, SO-16, Up to 2,500500kHz SSOP-16

LTC4008 Sync to 4 6 to 28 16 Ext µC Required SSOP-20 Up to 10,000SwitcherController

* 0.4C 1C


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NiMH NiCd

NiCd NiMH

V 1.2 1.2 3.6

V 1.55 1.55 4.1 4.2

V 1 1 2.7

$

10% 10% 6%

mAh

mWh/gm

NiMH

• • •• • •• • •

• • •• • •• • ≤ 1A • ≤ 1A


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USB 100mA

500mA

LTC4053 USB USB

•

• 100mA 500mA USB

• 1.25AUSB

• 10 MSOP

•

•

LTC4053 USB

LTC4410 USB

USB

USB

• USB

•

• LTC4053LTC1733

•

• 6 ThinSOT

LTC4410 USB

1k 3k

Li-IonBATTERY

5V WALLADAPTER

1A ICHG

3k

LTC4053

BAT

VCC

ICHG

PROG +

SYSTEMLOAD

USBPOWER

500mA ICHG

USB

4.7µF

4.7µF

0.1µF

1Ω 3.4k1% 1M

VOUT

GND

NTC

TIMER1-CELLLi-Ion

LTC4410

LTC4053

VIN

VCC

BAT

GND

SHDN

USBPCHP

MODE

OFF ON

SYSTEM POWERSUPPLY

USBMODE500mA100mA

SUSPEND

LTC4410MODE

101

LTC4053SHDN

110

4.35V TO 5.5VFROM

USB

100mA 500mA

IRLML6401

PROG

LTC4410 USB LTC4053


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LTC4412 PowerPathTM

LTC4412

• 0.02V

0.7V

• 6 ThinSOT

•

• 11µA

LTC1998 IC

1%

1% 2.5µA

6 ThinSOT

• 2.5V 3.25V

•

• 1% 1%

•

LTC1998

LTC4412

POWER SAVINGS!

LTC4412 “IDEAL DIODE”

Vf = 0.02V

CURR

ENT TYPICAL DIODE

Vf = 0.3V TO 0.7V

VOLTAGE

VIN SENSE

WALLADAPTER

INPUT

BATTERYCELL(S) LTC4412

1N5819

FDN306P

COUT

TO LOAD

GND GATE

CTL STAT

LTC1998

R11%

R21%

R31%

HYST

VTRIP

BATTVLOGIC

BATTLO

REGULATOR

µP

Li-Io

n

GND

0.1µF+

THRESHOLDADJUST

HYST

VTRIP

BATT

VLOGIC

BATTLO

1.1R

R

1.2V

LTC1998

LTC4412 PowerPath

LTC4412


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LT1787

2.5V

60µA

• 2.5V 60V 60µA

•

• MSOP-8

• – 40°C 125°C

• ± 40µV12

•

LT1787

C0.1µF

RSENSE

VOUT

TOLOAD

1

2

3

4

8

7

6

5

LT1787HVFIL+FIL–

VBIAS

VOUT

VS– VS

+

DNC

VEE

ROUT

LT1787

+852 2428-0303+852 2348-0885

+86 (21) 6375-9478+86 (21) 6375-9479

+86 (10) 6801-1080+86 (10) 6305-4030

+852 2375-8866+86 (10) 8268-4280+86 (21) 6440-1373+86 (755) 8386-7431+86 (25) 481-0877+86 (28) 8652-7116+86 (29) 837-8918+86 (27) 8736-0546

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