TOREX XC9128, XC9129 User Manual

)

F

XC9128/XC9129 Series

ETR0411-010a

1A Driver Transistor Built-In, Step-Up DC/DC Converters

■GENERAL DESCRIPTION

The XC9128/XC9129 series are synchronous step-up DC/DC converters with a 0.2 (TYP.) N-channel driver transistor and a

synchronous 0.2 (TYP.) P-channel switching transistor built-in. A highly efficient and stable current can be supplied up to

1.0A by reducing ON resistance of the built-in transistors. With a high switching frequency of 1.2MHz, a small inductor is selectable making the series ideally suited for applications requiring low profile or space saving solutions. With the MODE pin, the series provides mode selection of PWM control or PFM/PWM automatic switching control. In the PWM/PFM automatic switching mode, the series switches from PWM to PFM to reduce switching loss when load current is small. When load current is large, the series switches automatically to the PWM mode so that high efficiency is achievable over a wide range of load conditions. The series also provides small output ripple from light to large loads by using the built-in circuit which enables the smooth transition between PWM and PFM. With a adaptor enable function of the XC9128 series, when a voltage higher than the input voltage is applied to the output, the input and the output become isolated making it possible for the IC to work in parallel with the likes of an AC adaptor.

■APPLICATIONS

●Digital audio equipment

●Digital cameras, Video equipment

●Computer Mouses

●Various multi-function power supplies using alkali cells (1

to 3 cells), nickel hydride batteries, or single lithium cells

■ FEATURES

High Efficiency, Large Current Step-Up Converter Output Current : 150mA＠V

Input Voltage Range : 0.8V~6.0V Output Voltage Setting Range

Oscillation Frequency : 1.2MHz (Fixed oscillation frequency

Input Current : 1.0A Maximum Current Limit : 1.2A (MIN.), 2.0A (MAX.) Control : PWM, PWM/PFM control

High Speed Transient Response Protection Circuits : Thermal shutdown

Soft-Start Time : 5ms (TYP.) internally set Ceramic Capacitor Compatible

Adaptor Enable Function (XC9128 series) Flag Output (XC9128 series) : Open-drain output Operating Ambient Temperature Packages : MSOP-10, USP-10B Environmentally Friendly

☆GreenOperation Compatible

=3.3V, VIN=0.9V

=1.8V, I

OUT

=3.3V, VIN=1.8V

OUT

=3.3V,

OUT

=10mA→100mA

OUT

500mA＠V

: 1.8V~5.3V (Externally set)

Set up freely with a reference voltage supply of 0.45V (±0.010V) & external components

accuracy ±15%)

externally selectable

:100mV @ V

V

IN

Integral latch method (Over current limit)

: - 40℃～+85℃

: EU RoHS Compliant, Pb Free

■TYPICAL APPLICATION CIRCUIT

V

C

IN

L

EN

FO

PGND

1

2

Lx

BAT

3

EN

4

FO

5

VOUT

MODE

AGND

AEN/

10

MODE

C

9

FB

8

7

6

R

FB1

FB

R

FB2

V

C

L

(ceramic)

OUT

■TYPICAL PERFORMANCE CHARACTERISTICS

●Efficiency vs. Output Current

XC9128B45CD

L=4.7μH(LTF5022-LC),CL=30μF(LMK212BJ106KG ×3

100

90

80

70

60

50

40

30

Efficiency: EFFI (%

20

10

0

0.1 1 10 100 1000

1.8V

Output Current: I

V

=3.3V,VEN=6V,VFO=OPEN,V

OUT

R

=270kΩ,R

FB1

OUT

=43kΩ,CFB=12pF,CIN=10μ

FB2

3.0V

PW M/PFM (V PWM (V

MODE=VOUT

(mA)

MODE

=0V) )

=0V

AEN/

1/26

XC9128/XC9129 Series

■PIN CONFIGURATION

P

1

GND

Lx 2

BAT 3

EN 4

FO 5

MSOP-10

(TOP VIEW)

■PIN ASSIGNMENT

10 V

OUT

9 MODE

8 FB

7 A

GND

6 AEN/

FO 5

EN 4

BAT 3

P

GND

NC 5

EN 4

BAT 3

P

GND

Lx 2

1

USP-10B

(BOTTOM VIEW)

XC9128 Series

Lx 2

1

USP-10B

(BOTTOM VIEW)

XC9129 Series

6 AEN/

7 A

GND

8 FB

9 MODE

10 V

OUT

6 NC

7 A

GND

8 FB

9 MODE

10 V

OUT

PIN NUMBER

MSOP-10*

USP-10B*

(XC9128)

USP-10B*

(XC9129)

PIN NAME FUNCTION

1 1 1 PGND Power Ground 2 2 2 Lx Output of Internal Power Switch 3 3 3 BAT Battery Input 4 4 4 EN Chip Enable 5 5 - FO Flag Output 6 6 - AEN/ Adaptor Enable 7 7 7 AGND Analog Ground 8 8 8 FB Output Voltage Monitor 9 9 9 MODE Mode Switch

10 10 10 VOUT Output Voltage

- - 5, 6 NC No Connection

*For MSOP-10 and USP-10B packages, please short the GND pins (pins 1 and 7).

*The dissipation pad for the USP-10B package should be solder-plated following the recommended mount pattern and metal masking so as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the Ground pins (pins 1 and 7).

2/26

■FUNCTION CHART

1. EN, AEN/ Pin Function

●XC9128 Series

EN PIN AEN/ PIN

L→H L

H H→L Lower than 0.45×0.8V Operation Available H H→L Higher than 0.45×0.95V Operation Not Available

H H -

L L

L H

* Do not leave the EN and AEN/ Pins open.

●XC9129 Series

EN PIN IC OPERATIONAL STATE

H Operation

L Disable

* Do not leave the EN Pin open.

2. MODE Pin Function

●XC9128/XC9129 Series

MODE PIN FUNCTION

H PWM Control

L PWM/PFM Automatic Switching Control

FB PIN VOLTAGE

-

XC9128/XC9129

Series

IC OPERATIONAL STATE SOFT-START FUNCTION

Operation Available

Step-Up Operation

Shut-Down

Disable Disable -

-

3/26

XC9128/XC9129 Series

■PRODUCT CLASSIFICATION

●Ordering Information

XC9128①②③④⑤⑥-⑦

DESIGNATOR ITEM SYMBOL DESCRIPTION

① Integral Protection

②③ Reference Voltage 45

④ Oscillation Frequency C 1.2MHz

(*1)

⑤⑥-⑦

XC9129①②③④⑤⑥-⑦

DESIGNATOR ITEM SYMBOL DESCRIPTION

① Integral Protection

②③ Reference Voltage 45

④ Oscillation Frequency C 1.2MHz

⑤⑥-⑦

(*1)

The “-G” suffix denotes Halogen and Antimony free as well as being fully RoHS compliant.

(*1)

4/26

(*1)

・・・・Adaptor Chip Enable Pin and Flag Output Pin are added

B With integral protection

D Without integral protection

Fixed reference voltage 0.45Ｖ ②=4, ③=5

AR MSOP-10 (1,000/Reel)

Packages

(Order Unit)

AR-G MSOP-10 (1,000/Reel)

DR USP-10B (3,000/Reel)

DR-G USP-10B (3,000/Reel)

(*1)

・・・・Adaptor Chip Enable Pin and Flag Output Pin are not added

B

With integral protection (under development)

D Without integral protection

Fixed reference voltage 0.45Ｖ ②=4, ③=5

Package

(Order Unit)

DR USP-10B (3,000/Reel)

DR-G USP-10B (3,000/Reel)

■BLOCK DIAGRAM

●XC9128 Series

* XC9129 Series

The XC9129 series does not have AEN/ pin and FO pin.

■ABSOLUTE MAXIMUM RATINGS

PAR AMETER SYMBOL RATINGS UNITS

V

Pin Voltage VOUT - 0.3～6.5 V

OUT

AEN/ Pin Voltage

FO Pin Voltage

FO Pin Current

FB Pin Voltage VFB - 0.3～6.5 V

BAT Pin Voltage VBAT - 0.3～6.5 V

MODE Pin Voltage VMODE - 0.3～6.5 V

EN Pin Voltage VEN - 0.3～6.5 V

LX Pin Voltage VLx - 0.3～V

LX Pin Current ILx 2000 mA

Power Dissipation

Operating Ambient Temperature Topr - 40～+85

Storage Temperature Tstg - 55～+125

AGND, PGND is the standard voltage for all of voltages.

*1: When implemented on a PCB.

The XC9129 series does not have AEN/ pin and FO pin. These pins are available only in the XC9128 series.

*2:

(*2)

VAEN/ - 0.3～6.5 V

(*2)

VFO - 0.3～6.5 V

(*2)

IFO 10 mA

+0.3 V

OUT

150

(*1)

MSOP-10 350

USP-10B

Pd

XC9128/XC9129

Series

Ta =2 5℃

mW

o

C

o

C

5/26

XC9128/XC9129 Series

■ELECTRICAL CHARACTERISTICS

XC9128/XC9129 Series

LX SW "Nch" ON Resistance RLxN VIN=V

Integral Latch Time (XC9128)

Integral Latch Time (XC9129)

PAR AMETER SYMBOL CONDITIONS MIN. TYP. MAX.

Input Voltage VIN - - - 6.0 V -

FB Voltage VFB

Output Voltage Setting Range VOUTSET - 1.8 - 5.3 V ①

Operation Start Voltage VST1

Oscillation Start Voltage VST2

Operation Hold Voltage VHLD

Supply Current 1 IDD1 VIN = V

Supply Current 2 (XC9128) - 30 80

IDD2

Supply Current 2 (XC9129)

Input Pin Current I

Stand-by Current I

Oscillation Frequency f

Maximum Duty Cycle

Minimum Duty Cycle

BAT

STB

OSC

MAXDTY

MINDTY

PFM Switching Current IPFM

Efficiency

(*2)

EFFI

LX SW "Pch" ON Resistance RLxP

LX Leak Current ILXL VIN=V

Current Limit

(*5)

ILIM V

(*6)

tLAT

Soft-Start Time 1 tSS1

Soft-Start Time 2

Soft-Start Time 3

Thermal Shutdown

Temperature

(*7)

tSS2

(*7)

tSS3

T

TSD - - 150 -

Hysteresis Width THYS - - 20 -

Output Voltage Drop

Protection

(*6)

FO Output Current

FO Leakage Current

(*7)

IFO_OUT

(*7)

IFO_Leak VIN = V

V

LVP

×0.9

(*3)

(*8)

(*4)

VEN=0V

,

V

OUT=VIN

=3.3V, VFO=0V

Voltage to start oscillation during

= 0.46V → 0.44V

V

FB

Connect to external components,

RL=1kΩ

Connect to external components,

RL=33Ω

Voltage to start oscillation during

VIN=0V → 1V, RL=1kΩ

Connect to external components, RL=1kΩ

=3.3V, VFB=0.45V×0.9 - 3 6 mA ②

OUT

VIN = V

OUT

=3.3V

VFB=0.45V×1.1 (Oscillation stop),

V

=0V

MODE

V

=3.3V, V

IN

= V

IN

= V

V

IN

VIN = V

=1.8V, VEN=0V - 2 10 μA ③

OUT

=3.3V, VEN=0V - 2 10 μA ②

OUT

=3.3V, VFO=0V

OUT

VFB=0.45V

=3.3V, VFO=0V

OUT

V

=0.45V×0.9

FB

=3.3V, VFO=0V

OUT

VFB=0.45V×1.1

Connect to external components,

V

=0V, RL=330Ω

MODE

Connect to external components,

=33Ω

R

L

VIN=VLx=V

+50mV,

OUT

VFB=0.45V×1.1

=3.3V, Lx =50mV

OUT

= VLX, VFB=0V - 1 - μA ⑤

OUT

>2.5V 1.2 1.5 2.0 A ①

OUT

Time to stop oscillation during

=33Ω → 3.3Ω, VFO=L → H

R

L

Time to stop oscillation during

=33Ω → 3.3Ω

R

L

Time to start oscillation during

→ V

at VIN = V

IN

=3.3V, VFO=0V,

OUT

VFB=0.45V×0.95

VIN = V

=3.3V, VFO=0V,

OUT

VFB=0.45V×0.95

Time to start oscillation during

V

AEN/=VIN

= V

V

IN

OUT

V

→0V.

=3.3V, VFO=0V,

=0.45V×0.8

FB

Time to start oscillation during

V

AEN/=VIN

→0V

VIN =3.3V

Voltage to stop oscillation during

=1.56V→1.3V

V

OUT

VIN =V

=3.3V, VFO=0.25V 1.3 1.7 2.2 mA ④

OUT

=3.3V, VEN=0V ,VFO=1V - 0 1 μA ④

OUT

0.44 0.45 0.46 V ④

- - 0.8 V ①

- - 0.9

- 0.8 - V ①

- 0.7 - V ①

- 28 78

1.02 1.20 1.38 MHz ④

85 92 96 % ④

- - 0 % ④

- 250 400 mA ①

- 93 - % ①

- 0.20

-

0.20

- 3.5 - ms ①

1.7 5.3 10.5 ms ④

- 0.02 0.04 ms ④

1.7 5.3 10.5 ms ④

1.3 1.48 1.56 V ⑥

0.35

(*1)

0.35

Topr=25 oC

UNITS CIRCUIT

(*1)

V ①

μA ②

(*1)

Ω ⑤

(*1)

Ω ⑦

o

C -

o

C -

6/26

)

XC9128/XC9129

Series

■ELECTRICAL CHARACTERISTICS (Continued

UNITS

AEN/

=0V

Topr=25oC

CIRCUIT

（*8）

●XC9128/XC9129 Series (Continued

PAR AMETER SYMBOL CONDITIONS MIN. TYP. MAX.

EN "H" Voltage VENH

EN "L" Voltage VENL

MODE "H" Voltage VMODEH RL =330Ω, Voltage operates at PWM control 0.65 - 6.0 V

MODE "L" Voltage VMODEL RL =330Ω, Voltage operates at PFM control AGND - 0.2 V

AEN/ Voltage

EN "H" Current IENH

EN "L" Current IENL

MODE "H" Current IMODEH

MODE "L" Current IMODEL

AEN/ "H" Current

AEN/ "L" Current

FB "H" Current IFBH

FB "L" Current IFBL

Test Conditions:

For the Circuit No.3, unless otherwise stated,

For the Circuit No.7, unless otherwise stated, V

External Components:

*

1 : Designed value

*

2 : Efficiency ={(output voltage) X (output current)} ÷ {(input voltage) X (input current)} X 100

*

3 : LX SW "P-ch" ON resistance=（VLx-V

*

4 : Testing method of LX SW "N-ch" ON resistance is stated at test circuits.

*

5 : Current flowing through the Nch driver transistor is limited.

*

6 : The XC9128D/XC9129D series does not have integral latch protection and V

This is only available with the XC9128B/XC9129B series.

*

7 : The XC9129 series does not have FO and AEN/ pins. These pins are only available in the XC9128 series.

*

8 : The XC9129 series does not have FO and AEN/ pins. The AEN/FO functions are only effective for the test of the XC9128 series.

(*7)

VAEN/

(*7)

IAEN/H

(*7)

IAEN/L

For the Circuit No.1, unless otherwise stated, V

For the Circuit No.2, unless otherwise stated, V

For the Circuit No.4, unless otherwise stated,

For the Circuit No.5, unless otherwise stated,

For the Circuit No.6, unless otherwise stated,

For the Circuit No.1, R

C

For the Circuit No.2,3, C

For the Circuit No.4,6, C

For the Circuit No.5, C

For the Circuit No.7, C

=10μF（ceramic）, CIN=10μF（ceramic）

L2

VIN =V

Voltage to start oscillation during

VFB=0.45V×0.9, VEN= 0.2V→0.65V

VIN = V

Voltage to stop oscillation during

VIN = V

Voltage to start oscillation during V

V

IN=VOUT=VFB

VIN=V

=270kΩ, R

FB1

=1μF（ceramic）

IN

=1μF（ceramic）, Rpull=300Ω

IN

=1μF（ceramic）, C

IN

=1μF（ceramic）, C

IN

pin test voltage）÷100mA

OUT

=3.3V, VFO=0V

OUT

=3.3V, VFO=0V

OUT

VFB=0.45V×0.9,

V

= 0.65V→0.20V

EN

=3.3V, VFO=0V

OUT

IN=VOUT=VFB=VEN

=6.0V, VEN=0V -0.1 - - μA

OUT=VFB=VMODE

OUT=VFB

OUT

VIN=V

=6.0V, V

OUT=VFB=VAEN/

=6.0V, VEN=0V, V

OUT=VFB

=6.0V, VFB=0V -0.1 - - μA

OUT

=43kΩ, CFB=12pF, L=4.7μH（LTF5022 TDK）, CL1=22μF（ceramic）,

FB2

=6.0V - - 0.1 μA

OUT

(*8)

0.65 - 6.0 V ④

(*8)

- - 0.2 V ④

= 0.9V→0.7V

AEN/

0.7 0.8 0.9 V ④

=6.0V - - 0.1 μA

=0V -0.1 - - μA

MODE

=6.0V - - 0.1 μA

=0V -0.1 - - μA

AEN/

=1.8V, VEN=V

IN

=1.8V, VFB =0V, VEN=V

IN

VIN=1.8V, V

VIN=1.8V, VFB=0V, VEN=V

VIN=3.3V, V

VEN=V

MODE

EN=VMODE

MODE=VFO

OUT=VEN=VMODE

=0V

AEN/

=Vpull=VFO=3.3V, VFB=0V

=3.3V

=3.3V, V

MODE

=3.3V, FB=0V

MODE

（*8）

=3.3V, V

=Vpull=VFO=3.3V, V

=1μF（ceramic）

=1μF（ceramic）, SBD =XBS304S17（TOREX）, Rpull=0.5Ω

function.

LVP

AEN/

=0V

AEN/

（*8）

=0V

（*8）

7/26

①

②

XC9128/XC9129 Series

■TYPICAL APPLICATION CIRCUIT

<Output Voltage Setting> Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based on the values of R

OUT=0.45 × (RFB1 + RFB2) / RFB2

V

The value of C the range of 10 kHz to 60 kHz. Adjustments are depending on application, inductance (L), load capacitance (CL) and dropout voltage.

[Example of calculation] When R

VOUT1 = 0.45 × (270k+43k ) / 43k = 3.276V

[Typical example]

FB1=270kΩ, RFB2=43kΩ,

VOUT (V)

1.8 300 100 10

2.5 270 59 12

3.3 270 43 12

5.0 180 17.8 15

[External Components]

1.2MHz:

L : 4.7μH (LTF5022-4R7-LC TDK) : 4.7μH (CDRH4D28C-4R7N SUMIDA) CL1 : 22μF (ceramic) CL2 : 10μF (ceramic) CIN : 10μF (ceramic)

* C

should be selected in 10μF or higher.

L1

Capacitance C

If C

L1

In case of the usage C check actual performance on the board.

* If using Tantalum or Electrolytic capacitors please be aware that ripple voltage will be higher due to the larger

ESR (Equivalent Series Resistance) values of those types of capacitors. Please also note that the IC’s operation may become unstable with such capacitors so we recommend that you fully check actual performance.

, speed-up capacitor for phase compensation, should be f

FB

is lower than 10μF, operation may be unstable.

8/26

FB1 and RFB2. The sum of RFB1 and RFB2 should normally be 500k or less.

= 1 / (2 x

ZFB

RFB1 (kΩ) RFB2 (kΩ)

+ CL2 is recommended 30μF or higher. (Ceramic capacitor compatible)

L1

+ C

＜30μF, output ripple may increase so that we recommend that you fully

L2

CFB (pF)

x

CFB1 x RFB1) which is in

TOREX XC9128, XC9129 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual