TC1303B-CA1EUNTR datasheet, PDF

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TC1303B-CA1EUNTR: Description0.5 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO10; CategoryPower/power management The power supply circuit; File Size431KB，30 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com; Environmental Compliance

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TC1303B-CA1EUNTR Overview

0.5 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO10

TC1303B-CA1EUNTR Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Parts packaging code	TSSOP
package instruction	TSSOP,
Contacts	10
Reach Compliance Code	compli
ECCN code	EAR99
Other features	AUTOMATIC PWM TO PFM MODE
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	5.5 V
Minimum input voltage	2.7 V
Nominal input voltage	3.6 V
JESD-30 code	S-PDSO-G10
JESD-609 code	e3
length	3 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	10
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output current	0.5 A
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Package shape	SQUARE
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	1.1 mm
surface mount	YES
Switch configuration	BUCK
Maximum switching frequency	2400 kHz
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	0.5 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	40
width	3 mm
Base Number Matches	1

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TC1303B

500 mA Synchronous Buck Regulator,

+ 300 mA LDO with Power-Good Output

Features

• Dual-Output Regulator (500 mA Buck Regulator

and 300 mA Low-Dropout Regulator)

• Power-Good Output with 300 ms Delay

• Total Device Quiescent Current = 65 µA, Typ.

• Independent Shutdown for Buck and LDO

Outputs

• Both Outputs Internally Compensated

• Synchronous Buck Regulator:

- Over 90% Typical Efficiency

- 2.0 MHz Fixed Frequency PWM

(Heavy Load)

- Low Output Noise

- Automatic PWM to PFM mode transition

- Adjustable (0.8V to 4.5V) and Standard Fixed

Output Voltages (0.8V, 1.2V, 1.5V, 1.8V, 2.5V,

3.3V)

• Low-Dropout Regulator:

- Low-Dropout Voltage = 137 mV Typ. @

200 mA

- Standard Fixed Output Voltages

(1.5V, 1.8V, 2.5V, 3.3V)

• Power-Good Function:

- Monitors LDO Output Function (TC1303B)

- 300 ms Delay Used for Processor Reset

• Small 10-pin 3X3 DFN or MSOP Package

Options

• Operating Junction Temperature Range:

- -40°C to +125°C

• Undervoltage Lockout (UVLO)

• Output Short Circuit Protection

• Overtemperature Protection

Description

The TC1303B combines a 500 mA synchronous buck

regulator and 300 mA Low-Dropout Regulator (LDO)

with a power-good monitor to provide a highly

integrated solution for devices that require multiple

supply voltages. The unique combination of an

integrated buck switching regulator and low-dropout

linear regulator provides the lowest system cost for

dual-output voltage applications that require one lower

processor core voltage and one higher bias voltage.

The 500 mA synchronous buck regulator switches at a

fixed frequency of 2.0 MHz when the load is heavy

providing a low noise, small-size solution. When the

load on the buck output is reduced to light levels, it

changes operation to a Pulse Frequency Modulation

(PFM) mode to minimize quiescent current draw from

the battery. No intervention is necessary for smooth

transition from one mode to another.

The LDO provides a 300 mA auxiliary output that

requires a single 1 µF ceramic output capacitor,

minimizing board area and cost. The typical dropout

voltage for the LDO output is 137 mV for a 200 mA

load.

For the TC1303B, the power-good output logic level is

based on the regulation of the LDO output only. The

buck regulator can be turned on and off without affecting

the power-good signal.

The TC1303B is available in either the 10-pin DFN or

MSOP package.

Additional protection features include: UVLO,

overtemperature and overcurrent protection on both

outputs.

For a complete listing of TC1303B standard parts, con-

sult your Microchip representative.

Applications

•

Cellular Phones

Portable Computers

USB Powered Devices

Handheld Medical Instruments

Organizers and PDAs

Package Type

10-Lead DFN

SHDN2 1

IN2

OUT2

PG 4

GND

10 P

GND

9 L

8 V

IN1

7 SHDN1

6 V

FB1

OUT1

10-Lead MSOP

SHDN2 1

IN2

OUT2

PG 4

GND

10 P

GND

9 L

8 V

IN1

7 SHDN1

6 V

FB1

OUT1

2005 Microchip Technology Inc.

DS21949A-page 1

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