TOREX XC6365, XC6366 User Manual

XC6365/XC6366 Series

ETR0501_005a

PWM Controlled, PWM/PFM Switchable Step-Down DC/DC Controllers

■GENERAL DESCRIPTION

The XC6365/XC6366 series are multi-functional step-down DC/DC controllers which have 1A output current capability by using an externally connected transistor, coil, diode and capacitor. Output voltage is programmable in 0.1V increments between 1.5V to 6.0V (V standard voltage supply internal and using externally connected components, output voltage can be set up freely (FB). With a 300kHz switching frequency, the size of the external components can be reduced. Control switches from PWM to PFM during light loads with the XC6366 (PWM/PFM switchable) and the series is highly efficient from light loads to large output currents. Soft start time of XC6365/ XC6366A, B series is internally set to 10ms and XC6365/66C, D series regulate soft-start time by connecting resistors and capacitors externally. During stand-by time (CE pin "Low" ), current consumption is reduced to less than 0.5μA. With UVLO internal, the external transistor will be forcibly switched off if used below the stipulated voltage.

■APPLICATIONS

●Electronic information organizers

●Palmtops

●Cellular and portable phones

●Portable audio systems

●Various multi-function power supplies

■TYPICAL APPLICATION CIRCUIT

■FEATURES

Input Voltage Range : 2.2V ~ 10V (VOUT type) Output Voltage Range Oscillation Frequency

Output Current : More than 1.0A (V High Efficiency : 92% (TYP.) Stand-by Capability : I Selection : Soft-start set-up external

Maximum Duty Cycle : 100% Packages : SOT-25, USP-6C Environmentally Friendly :

■TYPICAL PERFORMANCE

CHARACTERISTICS

OUT) (±2.5% accuracy). Further, with 1.0V of

☆GreenOperation Compatible

: 1.5V ~ 6.0V (0.1V increments) (±2.5%)

: 300kHz (±15%)

Custom products for 180, 500kHz

IN=5.0V, VOUT=3.0V)

=0.5μA (MAX.)

STB

Output voltage set-up internal (V

Output voltage set-up external (FB)

PWM/PFM Control (XC6366)

EU RoHS Compliant, Pb Free

OUT)

1/24

XC6365/XC6366 Series

■PIN CONFIGURATION

■PIN ASSIGNMENT

PIN NUMBER

SOT-25

USP-6

PIN NAME FUNCTION

1 3 EXT/ External Transistor Connection 2 2 VDD Power Supply 3 1 GND Ground

4 6 CE

5 4 VOUT (FB)

■PRODUCT CLASSIFICATION

●Selection Guide

5 NC No Connection

Chip Enable Soft-Start Capacitor Connection

with Soft-Start Externally Set-Up Types (C, D)

Output Voltage Monitor FB with Externally

Set-Up Types (B, D)

*The dissipation pad of the USP-6C package

should be left open. If the circuit needs to be connected to other pin, it should be connected to the V

DD (No.2) pin.

2/24

■PRODUCT CLASSIFICATION (Continued)

●Ordering Information

XC6365①②③④⑤⑥-⑦ XC6366①②③④⑤⑥-⑦

(*1)

PWM control

(*1)

PWM/PFM switching control

DESIGNATOR ITEM SYMBOL DESCRIPTION

A VOUT type: Internally set-up, soft-start internally set-up

①

Type of DC/DC Converter

B FB type: Externally set-up, soft-start internally set-up

C VOUT type: Internally set-up, soft-start externally set-up

D FB type: Externally set-up, soft-start internally set-up

②③

Output Voltage

15～60 VOUT type: 3.0V output → ②=3, ③=0

FB type: 10 fixed → ②=1, ③=0 fixed

3 300kHz

④

Oscillation Frequency

5 500kHz (custom)

2 180kHz (custom)

MR SOT-25 (3,000/Reel)

⑤⑥-⑦

Packages

(Order Unit)

MR-G SOT-25 (3,000/Reel)

ER USP-6C (3,000/Reel)

ER-G USP-6C (3,000/Reel)

(*1)

The “-G” suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant.

XC6365/XC6366

Series

3/24

XC6365/XC6366 Series

■BLOCK DIAGRAMS

XC6365, XC6366 Series A, C type (VOUT)

XC6365, XC6366 Series B, D type (FB)

4/24

XC6365/XC6366

Series

■ABSOLUTE MAXIMUM RATINGS

PAR AMETER SYMBOL RATINGS UNITS

VIN Pin Voltage VDD -0.3 ~ +12 V

VOUT Pin Voltage VOUT -0.3 ~ VIN +0.3 V

FB Pin Voltage VFB -0.3 ~ VIN +0.3 V

CE Pin Voltage VCE -0.3 ~ VIN +0.3 V EXT/ Pin Voltage VEXT/ -0.3 ~ VIN +0.3 V EXT/ Pin Current

Power Dissipation

SOT-25 150

USP-6C

IEXT/

±100

100

Operating Temperature Range Topr -30 ~ +80

Storage Temperature Range Tstg -40 ~ +125

Note: Voltage is all ground standardized.

■ELECTRICAL CHARACTERISTICS

XC6365A333MR, XC6366A333MR

(VOUT=3.3V, f

=300kHz)

OSC

PAR AMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS

Output Voltage VOUT 3.218 3.300 3.383 V

Maximum Input Voltage VIN 10.0 - - V

UVLO Voltage

(Minimum Operating

Voltage)

UVLO

Same as I Voltage which EXT/pin voltage holding “H” level

DD1,

0.9 - 2.2 V

Supply Current 1 IDD1 No external components, CE=VDD, VOUT=0V - 57 102

Supply Current 2 IDD2

No external components, CE=V

OUT=VDD

XC6365 - 57 102 XC6366 - 15 27

Stand-by Current ISTB No external components, CE=VOUT=0V - - 0.5

Oscillation Frequency f

OSC

Measuring of EXT/ waveform, VIN=output voltage + 0.1V

255 300 345 kHz

Maximum Duty Ratio MAXDTY 100 - - %

PFM Duty Ratio PFMDTY No load (XC6366 only) 15 25 35 %

CE "High" Voltage VCEH

CE "Low" Voltage VCEL

No external components, V

Voltage which EXT/pin voltage holding “L” level No external components, V Voltage which EXT/pin voltage holding “H” level

OUT=0V,

0.65 - - V

- - 0.20 V

EXT "High" ON Resistance REXTBH Same as IDD2, VEXT/=VDD-0.4V - 16 22

EXT "Low" ON Resistance REXTBL Same as IDD1, VEXT/=0.4V - 14 19

Efficiency EFFI

Soft-Start Time tSS

Conditions: 1. Unless otherwise stated, connect external components. VIN=VDD = 5.0V, IOUT = 220mA

2. XC6365/66C series external components: C

Use of a XP162A12A6 transistor recommended Connect R (When V

SS, CSS, CE, 0V→ 3.0V

IN≦3.0V, VIN=3.0V)

SS=0.033μF, R SS=470kΩ

- 92 - %

5 10 20

Ta = 2 5℃

℃ ℃

Ta =2 5℃

μA μA μA μA

μA μA

5/24

XC6365/XC6366 Series

■ELECTRICAL CHARACTERISTICS (Continued)

XC6365A503MR, XC6366A503MR

PAR AMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS

Output Voltage VOUT 4.875 5.000 5.125 V

Maximum Input Voltage VIN 10.0 - - V

UVLO Voltage

(Minimum Operating Voltage)

VUVLO

Same as IDD1, Voltage which EXT/pin voltage holding “H” level

Supply Current 1 IDD1 No external components, CE=VDD, VOUT=0V - 67 122

Supply Current 2 IDD2

No external components, CE=V

OUT=VDD

Stand-by Current ISTB No external components, CE=VOUT=0V - - 0.5

Oscillation Frequency f

OSC

Measuring of EXT/ waveform, V

IN=output voltage + 0.1V

Maximum Duty Ratio MAXDTY 100 - - %

PFM Duty Ratio PFMDTY No load (XC6366 only) 15 25 35 %

CE "High" Voltage VCEH

CE "Low" Voltage VCEL

No external components, VOUT=0V, Voltage which EXT/pin voltage holding “L” level No external components, VOUT=0V, Voltage which EXT/pin voltage holding “H” level

EXT "High" ON Resistance REXTBH Same as IDD2, VEXT/=VIN-0.4V - 12 17

EXT "Low" ON Resistance REXTBL Same as IDD1, VEXT/=0.4V - 10 14

Efficiency EFFI

Soft-Start Time tSS

Conditions: 1. Unless otherwise stated, connect external components. VIN=VDD = 7.5V, IOUT = 330mA

2. XC6365/66C series external components: C

Use of a XP162A12A6 transistor recommended Connect R (When V

SS, CSS, CE, 0V→ 3.0V

IN≦3.0V, VIN=3.0V)

SS=0.033μF, R SS=470kΩ

(VOUT=5.0V, f

XC6365 - 67 122 XC6366 - 16 29

=300kHz)

OSC

Ta =2 5℃

0.9 - 2.2 V

μA μA μA μA

255 300 345 kHz

0.65 - - V

- - 0.20 V

μA μA

- 93 - %

5 10 20 ms

6/24

XC6365/XC6366

Series

■ELECTRICAL CHARACTERISTICS (Continued)

XC6365B103MR, XC6366B103MR

PAR AMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS

Output Voltage VOUT 2.925 3.000 3.075 V

Maximum Input Voltage VIN 10.0 - - V

UVLO Voltage

(Minimum Operating Voltage)

VUVLO

Same as IDD1, Voltage which EXT/pin voltage holding “H” level

Supply Current 1 IDD1 No external components, CE=VIN, VOUT=0V - 55 100

Supply Current 2 IDD2

No external components, CE=V

DD, FB=1.2V

Stand-by Current ISTB No external components, CE=FB=0V - - 0.5

Oscillation Frequency f

OSC

Measuring of EXT/ waveform, V

IN=output voltage + 0.1V

Maximum Duty Ratio MAXDTY 100 - - %

PFM Duty Ratio PFMDTY No load (XC6366 only) 15 25 35 %

CE "High" Voltage VCEH

CE "Low" Voltage VCEL

No external components, FB=0V, Voltage which EXT/pin voltage holding “L” level No external components, VOUT=0V, Voltage which EXT/pin voltage holding “H” level

EXT "High" ON Resistance REXTBH Same as IDD2, VEXT/=VIN-0.4V - 17 24

EXT "Low" ON Resistance REXTBL Same as IDD1, VEXT/=0.4V - 15 20

Efficiency EFFI

Soft-Start Time tSS

Conditions: 1. Unless otherwise stated, connect external components. VIN=VDD = 4.5V, IOUT = 200mA

2. XC6365/66C series external components: C

3. R

FB1 = 400kΩ, RFB2 = 200kΩ, CFB = 100ppF

Use of a XP162A12A6 transistor recommended Connect R (When V

SS, CSS, CE, 0V→ 3.0V

IN≦3.0V, VIN=3.0V)

SS=0.033μF, R SS=470kΩ

(VOUT=3.0V, f

=300kHz) Ta=25℃

OSC

0.9 - 2.2 V

XC6365 - 55 100 XC6366 - 15 27

255 300 345 kHz

0.65 - - V

- - 0.20 V

- 92 - %

5 10 20 ms

μA μA μA μA

μA μA

7/24

XC6365/XC6366 Series

■TEST CIRCUITS

Circuit 1. XC6365A, XC6366A

Circuit 2. XC6365B, XC6366B

Circuit 3. XC6365C, XC6366C

8/24

+ 16 hidden pages

TOREX XC6365, XC6366 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual