TS1935B Ver la hoja de datos (PDF) - TSC Corporation

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TS1935B

1.9A / 1.2MHz Boost DC to Dc Converter

TSC Corporation 

Preliminary

TS1935B

1.9A / 1.2MHz Boost DC to Dc Converter

SOT-25

Pin Definition:

1. SW

2. Ground

3. FB

4. EN

5. Input

General Description

The TS1935B is a current mode step up converter intended for small, low power applications. The converter input

voltage ranging from 2.6V to 5.5V. The Output voltage can be set up to 27V. The frequency is 1.2MHz allows the

use of small external inductors and capacitors and provides fast transient response. Internal soft start results in

small inrush current and extends battery life. Internal power MOSFET with very low RDS (ON) provides high

efficiency. The TS1935B automatically transits from PWM to PFM during light load condition further increasing

efficiency. The converter also provides protection functions such as under-voltage lockout, current limit and

thermal shutdown.

Features

● 2.6V to 5.5 V operating input voltage range

● Adjustable output voltage range up to 27V

● 1.2MHz Fixed Switching Frequency

● Internal soft-start function

● Current limit and Thermal shutdown protection

● Under voltage Lockout

● ≤ 1µA Shutdown Current

Application

● White LED Current Source

● Digital Still Cameras

● Portable Electronics

● PDA’s and Palm-Top Computers

● Local Boost Regulator

Ordering Information

Part No.

Package

TS1935BCX5 RFG SOT-25

Note: “G” denotes for Halogen Free

Packing

3Kpcs / 7” Reel

Absolute Maximum Rating

Parameter

Symbol

Limit

Input Voltage

EN, VFB Voltage

VIN

VEN, VFB

GND - 0.3 to GND + 6.5

GND - 0.3 to VCC + 0.3

SW Voltage

VSW

30

Ambient Temperature Range

TA

-40 to +85

Junction Temperature Range

TJ

-40 to +125

Storage Temperature Range

TSTG

-40 to +150

Note: Stress above the listed absolute maximum rating may cause permanent damage to the device

Thermal Information

Parameter

Symbol

Maximum

Thermal Resistance* (Junction to Case)

ӨJC

110

Thermal Resistance* (Junction to Ambient)

Internal Power Dissipation

ӨJA

250

PD

(TJ-TA)/ӨJA

Maximum Junction Temperature

Tj

150

Lead Solder Temperature (260oC)

5

Note: ӨJA is measured with the PCB copper area of approximately 1 in2(Multi-layer).

Unit

V

V

V

oC

oC

oC

Unit

oC/W

oC/W

mW

oC

S

1/6

Version: Preliminary

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