LTC1148LCS#PBF datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > Power/power management> The power supply circuit> LTC1148LCS#PBF

LTC1148LCS#PBF: DescriptionIC REG CTRLR BUCK 14SOIC; CategoryPower/power management The power supply circuit; File Size235KB，20 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

Download Datasheet Parametric View All

LTC1148LCS#PBF Overview

IC REG CTRLR BUCK 14SOIC

LTC1148LCS#PBF Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	conform to
Maker	Linear ( ADI )
Parts packaging code	SOIC
package instruction	SOP, SOP14,.25
Contacts	14
Manufacturer packaging code	S
Reach Compliance Code	compliant
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER
control mode	CURRENT-MODE
Control Technology	CONSTANT OFF TIME
Maximum input voltage	20 V
Minimum input voltage	3.5 V
Nominal input voltage	10 V
JESD-30 code	R-PDSO-G14
JESD-609 code	e3
length	8.65 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	14
Maximum operating temperature	70 °C
Minimum operating temperature
Maximum output current	0.05 A
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP14,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	1.75 mm
surface mount	YES
Switch configuration	PUSH-PULL
Maximum switching frequency	250 kHz
technology	CMOS
Temperature level	COMMERCIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	3.9 mm

Preview

Download Datasheet

View All

LTC1148

LTC1148-3.3/LTC1148-5

High Efficiency Synchronous

Step-Down Switching Regulators

FEATURES

■

DESCRIPTIO

Ultrahigh Efficiency: Over 95% Possible

Current-Mode Operation for Excellent Line and Load

Transient Response

High Efficiency Maintained Over Three Decades of

Output Current

Low 160µA Standby Current at Light Loads

Logic Controlled Micropower Shutdown: I

< 20µA

Wide V

Range: 3.5V* to 20V

Short-Circuit Protection

Very Low Dropout Operation: 100% Duty Cycle

Synchronous FET Switching for High Efficiency

Adaptive Nonoverlap Gate Drives

Output Can Be Externally Held High in Shutdown

Available in 14-Pin Narrow SO Package

The LTC

1148 series is a family of synchronous step-

down switching regulator controllers featuring automatic

Burst Mode

operation to maintain high efficiencies at

low output currents. These devices drive external comple-

mentary power MOSFETs at switching frequencies up to

250kHz using a constant off-time current-mode architec-

ture providing constant ripple current in the inductor.

The operating current level is user-programmable via an

external current sense resistor. Wide input supply range

allows operation from 3.5V* to 18V (20V maximum).

Constant off-time architecture provides low dropout regu-

lation limited by only the R

DS(ON)

of the external MOSFET

and resistance of the inductor and current sense resistor.

The LTC1148 series combines synchronous switching for

maximum efficiency at high currents with an automatic low

current operating mode, called Burst Mode operation, which

reduces switching losses. Standby power is reduced to only

2mW at V

= 10V (at I

OUT

= 0). Load currents in Burst Mode

operation are typically 0mA to 300mA.

For operation up to 48V input, see the LTC1149 and

LTC1159 data sheets and Application Note 54.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Burst Mode is a trademark of Linear Technology Corporation.

* LTC1148L and LTC1148L-3.3 only.

Protected by U.S. Patents, including 6580258, 5481178.

APPLICATIO S

■

Notebook and Palmtop Computers

Portable Instruments

Battery-Operated Digital Devices

Cellular Telephones

DC Power Distribution Systems

GPS Systems

TYPICAL APPLICATIO

1µF

P-DRIVE

LTC1148HV-5

SHUTDOWN

SENSE

–

N-DRIVE

SGND

PGND

(5.2V TO 18V)

P-CHANNEL

Si4431DY

62µH

100µF

0V = NORMAL

>1.5V = SHUTDOWN

OUT

5V/2A

EFFICIENCY (%)

SENSE

0.05Ω

1000pF

N-CHANNEL

Si4412DY

MBRS140T3

3300pF

470pF

OUT

390µF

LT1148 • TA01

COILTRONICS CTX62-2-MP

KRL SL-1-C1-0R050J

Figure 1. High Efficiency Step-Down Converter

114835fd

LTC1148-5 Efficiency

100

= 6V

= 10V

0.02

0.2

LOAD CURRENT (A)

LTC1148 • TA01

Recommended Resources

Schematic diagram of low-noise tube preamplifier power supply

TDA7240A audio IC circuit diagram

Universal battery charger

AD594/595 type galvanic amplifier circuit

pause timer

Cross-sink amplifier circuit for low frequency measurement

Getting ready for 2011! Competition section recruits volunteers: Ha! Time flies so fast, and next year's competition is approaching! This section is now recruiting N enthusiastic volunteers to serve with us as the organizing committee of the EEWORLD competition sec...; EEWORLD社区 Electronics Design Contest

How to solve the problem of STM32 RTC starting with 20pF 32768 crystal oscillator (transferred): I saw on the Internet that the STM32 RTC would not oscillate when using a 20pF 32768 crystal oscillator. I tried it these days and it did happen when I powered it on for the first time. Later, I conne...; fuqing5542 stm32/stm8

Why "the electronic eyes of the security demonstration city have become blind": At the end of 2009, Anhui Business Daily published a report titled "Security Demonstration City Electronic Eyes Became Blind". Recently, such an incident occurred in Qianshan County, Anhui Province: Z...; xyh_521 Industrial Control Electronics

In s3c44b0, what is the SPUCR register used for? Doesn't each port have a PUP register to control the pull-up resistor?: Thanks...; yanxd1983 Embedded System

[Request] Experts please help me draw a circuit diagram of NEC720114 as USB hub: [Request] Experts, please help me draw a circuit diagram of NEC720114 as USB hub. I think this IC is relatively stable, so I hope friends who have used this IC can help me draw a diagram. Remuneration...; waityou Embedded System

How to connect two PLLs in series?: Is it true that there is no problem when two PLLs are connected in series during synthesis, but there will be problems during routing? ? Because generally we connect them in the way of IBUFG+BUFG, and...; eeleader FPGA/CPLD

Shortcut: L0 L1 L2 L3 L4 L5 L6 L7 L8 L9 LA LB LC LD LE LF LG LH LI LJ LK LL LM LN LO LP LQ LR LS LT LU LV LW LX LY LZ M0 M1 M2 M3 M4 M5 M6 M7 M8 M9 MA MB MC MD ME MF MG MH MI MJ MK ML MM MN MO MP MQ MR MS MT MU MV MW MX MY MZ N0 N1 N2 N3 N4 N5 N6 N7 N8 NA NB NC ND NE NF NG NH NI NJ NK NL NM NN NO NP NQ NR NS NT NU NV NX NZ O0 O1 O2 O3 OA OB OC OD OE OF OG OH OI OJ OK OL OM ON OP OQ OR OS OT OV OX OY OZ P0 P1 P2 P3 P4 P5 P6 P7 P8 P9 PA PB PC PD PE PF PG PH PI PJ PK PL PM PN PO PP PQ PR PS PT PU PV PW PX PY PZ Q1 Q2 Q3 Q4 Q5 Q6 Q8 Q9 QA QB QC QE QF QG QH QK QL QM QP QR QS QT QV QW QX QY R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 RA RB RC RD RE RF RG RH RI RJ RK RL RM RN RO RP RQ RR RS RT RU RV RW RX RY RZ

Popular Components