XC9260A10CPR-G_技术文档

XC9260/XC9261Series

COT Control, 1.5A Synchronous Step-Down DC/DC Converters

ETR05042-001

☆GreenOperation-compatible

■GENERAL DESCRIPTION

The XC9260/XC9261 series is a group of synchronous-rectification type DC/DC converters with a built-in P-channel MOS driver

transistor and N-channel MOS switching transistor, designed to allow the use of ceramic capacitors. Output voltage is internally

set in a range from 0.8V to 3.6V (accuracy: ±2.0%) increments of 0.05V. The device provides a high efficiency, stable power

supply with an output current of 1.5A to be configured using only a coil and two capacitors connected externally. Oscillation

frequency is set to 1.2MHz or 3.0MHz can be selected for suiting to your particular application.

As for operation mode HiSAT-COT ^(*)control excellent in transient response, the XC9260 series is PWM control, the XC9261

series is automatic PWM/PFM switching control, allowing fast response, low ripple and high efficiency over the full range of loads

(from light load to heavy load).

During stand-by, all circuits are shutdown to reduce current consumption to as low as 1.0μA or less. As for the soft-start function

as fast as 0.3ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS

driver transistor is forced OFF when input voltage becomes 2.00V or lower. The B types integrate C_LHigh Speed discharge

function which enables the electric charge at the output capacitor C_Lto be discharged via the internal discharge.

Two types of package SOT-89-5, USP-6C are available.

^(*)HiSAT-COT is an original Torex term for High Speed Transient Response.

■FEATURES

Input Voltage Range

Output Voltage Range

Quiescent Current

■APPLICATIONS

●Mobile phones

:

2.7V～5.5V

0.8V～3.6V (±2.0%)

25μA (f_OSC=3.0MHz)

1.5A

●Bluetooth headsets

Output Current

●Smart phones, Personal digital assistance

●Portable game consoles

●Digital still cameras, Camcorders

●Codeless phones

Oscillation Frequency

1.2MHz, 3.0MHz

90%

Efficiency

:

(V_IN=3.7V, V_OUT=1.8V, I_OUT=200mA)

HiSAT-COT Control

100% Duty Cycle

Control Methods

:

PWM Control (XC9260)

PWM/PFM Auto (XC9261)

Thermal Shutdown

Current Limit (Pendent character)

Short Circuit Protection (Type B)

Soft-Start

●Point-of-Load (POL)

Protection Circuits

Functions

UVLO

C_LHigh Speed Discharge (Type B)

Ceramic Capacitor

- 40℃ ～ + 105℃

Capacitor

Operating Ambient Temperature

Packages

SOT-89-5, USP-6C

EU RoHS Compliant, Pb Free

Environmentally Friendly

■

TYPICAL APPLICATION CIRCUIT

■TYPICAL PERFORMANCE

CHARACTERISTICS

XC9260A18D / XC9261A18D

L = LQM2MPN1R0MGH(1.0 H)

μ

C =10 F(GRM155R61A106M) C =10 F(GRM155R61A106M)

μ

IN

L

V_OUT

1.5A

L

100

V_IN

Lx

90

80

70

60

50

40

30

20

10

0

CE

V_OUT

XC9261

XC9260

VIN = 5.0V

VIN = 3.7V

PGND

AGND

C_IN

C_L

VIN = 5.0V

VIN = 3.7V

0.1

1

10

100

1000

10000

Output Current: I_OUT(mA)

1/28

XC9260/XC9261Series

■ BLOCK DIAGRAM

1) XC9260/XC9261 Series Type A (SOT-89-5)

2) XC9260/XC9261 Series Type B (SOT-89-5)

(*) The XC9260 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at “PWM” internally.

The XC9261 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at “PWM/PFM

automatic switching” internally.

Diodes inside the circuit are an ESD protection diode and a parasitic diode.

2) XC9260/XC9261 Series Type B (USP-6C)

(*) The XC9260 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at “PWM” internally.

The XC9261 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at “PWM/PFM

automatic switching” internally.

Diodes inside the circuit are an ESD protection diode and a parasitic diode.

2/28

XC9260/XC9261

Series

■PRODUCT CLASSIFICATION

1) Ordering Information

XC9260①②③④⑤⑥-⑦ PWM Control

XC9261①②③④⑤⑥-⑦ PWM/PFM Automatic switching control

DESIGNATOR

ITEM

SYMBOL

DESCRIPTION

Refer to Selection Guide

A

B

①

Type

Output voltage options

e.g. 1.2V → ②=1, ③=2

1.25V → ②=1, ③=C

②③

④

Output Voltage

08～36

0.05V increments : 0.05=A, 0.15=B, 0.25=C,

0.35=D, 0.45=E, 0.55=F,

0.65=H, 0.75=K, 0.85=L,

0.95=M

C

1.2MHz

Oscillation Frequency

Packages (Order Unit)

D

3.0MHz

PR-G

ER-G

SOT-89-5 (1,000/Reel)

USP-6C (3,000/Reel)

(*1)

⑤⑥-⑦

^(*1)The “-G” suffix denotes Halogen and Antimony free as well as being fully RoHS compliant.

2) Selection Guide

SHORT PROTECTION

TYPE

OUTPUT VOLTAGE C_LAUTO-DISCHARGE

UVLO

(LATCH)

A

B

Fixed

No

Yes

TYPE

CHIP ENABLE

CURRENT LIMIT

SOFT-START TIME

THERMAL SHUTDOWN

A

B

Yes

Fixed

Yes

3/28

XC9260/XC9261Series

■PIN CONFIGURATION

* The dissipation pad for the USP-6C package should be solder-plated in 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 GND (No. 1 and 2) pin.

■PIN ASSIGNMENT

PIN NUMBER

PIN NAME

FUNCTIONS

SOT-89-5 USP-6C

1

2

3

4

5

-

5

-

Lx

V_SS

Switching Output

Ground

3

4

6

2

1

V_OUT

CE

Output Voltage Monitor

Chip Enable

V_IN

Power Input

AGND

PGND

Analog Ground

Power Ground

-

■FUNCTION

CE PIN Function

PIN NAME

CE

SIGNAL

STATUS

L

Stand-by

Active

H

Please do not leave the CE pin open.

4/28

XC9260/XC9261

Series

■ABSOLUTE MAXIMUM RATINGS

Ta=25℃

PARAMETER

Input Voltage

SYMBOL

V_IN

RATINGS

UNITS

-0.3～+6.2

V

Lx PIN Voltage

V_Lx

-0.3～V_IN+0.3 or +6.2^(*1)

Output Voltage

CE Input Voltage

Lx Current

V_OUT

V_CE

I_Lx

-0.3～V_IN+0.3 or +4.0^(*2)

-0.3～+6.2

V

-

500

mA

SOT-89-5

USP-6C

1300 (PCB mounted) ^(*3)

Power Dissipation

Pd

mW

120

1000 (PCB mounted) ^(*3)

-40～+105

Operating Ambient Temperature

Storage Temperature

Topr

Tstg

℃

-55～+125

* All voltages are described based on the GND (AGND and PGND and V_SS) pin.

^(*1)The maximum value should be either V_IN+0.3V or +6.2V in the lowest.

^(*2)The maximum value should be either V_IN+0.3V or +4.0V in the lowest.

^(*3)This is a reference data taken by using the test board. Please refer to page 25 and 26 for details.

5/28

XC9260/XC9261Series

■ELECTRICAL CHARACTERISTICS

XC9260/XC9261 Series

Ta=25℃

PARAMETER

SYMBOL

V_OUT

CONDITIONS

MIN.

TYP.

MAX.

UNITS CIRCUIT

When connected to external components,

Output Voltage

<E-1> <E-2> <E-3>

V

①

I

_OUT=30mA

Operating Voltage Range

Maximum Output Current

V_IN

-

2.7

-

5.5

-

V

①

When connected to external components ^(*1),

I_OUTMAX

1500

mA

V_IN=<C -1>

UVLO Voltage ^(*2)

V_UVLO

V_OUT=0.6V,Voltage which Lx pin holding “L” level^(*6)

1.35

2.0

2.68

V

③

②

f_OSC=1.2MHz

V_OUT=V_OUT(T)× 1.1V

-

15.0

25.0

250

400

0.0

25.0

40.0

450

825

1.0

Quiescent Current

(XC9261)

Iq

μA

f_OSC=3.0MHz

f_OSC=1.2MHz

V_OUT=V_OUT(T)× 1.1V

Quiescent Current

(XC9260)

Iq

μA

ns

②

①

f_OSC=3.0MHz

Stand-by Current

Minimum ON time

Thermal shutdown

I_STB

V_CE=0.0V

When connected to external components,

V_IN= <C-1>, I_OUT= 1mA

t_ONmin

<E-5> <E-6> <E-7>

T_TSD

T_HYS

R_LXH

R_LXL

-

150

30

-

℃

Ω

①

④

Thermal shutdown

hysteresis

-

Lx SW ”H” ON Resistance

V_OUT=0.6V, I_LX=100mA ^(*3)

0.14

0.10

0.28

0.20

Lx SW ”L” ON

Resistance ^(*4)

V_OUT=V_OUT(T)V × 1.1, I_LX=100mA ^(*3)

Ω

Lx SW ”H” Leakage Current

Lx SW ”L” Leakage Current

Current Limit ^(*5)

I_LeakH

I_leakL

I_LIMH

V_IN=5.5V, V_CE=0V, V_OUT=0V, V_LX=0.0V

V_IN=5.5V, V_CE=0V, V_OUT=0V, V_LX=5.5V

V_OUT=0.6V, I_Lxuntil Lx pin oscillates

-

0.0

3.0

1.0

30.0

4.5

μA

A

⑤

⑥

2.5

Output Voltage

Temperature

∆V_OUT

/

I_OUT=30mA, -40℃≦Topr≦105℃

-

±100

-

ppm/℃

①

(V_OUT・∆Topr)

Characteristics

V_OUT=0.6V, Applied voltage to V_CE

,

CE ”H” Voltage

CE ”L” Voltage

V_CEH

1.40

-

V_IN

V

③

Voltage changes Lx to “H” level ^(*6)

V_OUT=0.6V, Applied voltage to V_CE

Voltage changes Lx to “L” level ^(*6)

,

(*7)

V_SS

V_CEL

0.30

CE ”H” Current

CE ”L” Current

I_CEH

I_CEL

V_IN=5.5V, V_CE=5.5V, V_OUT=0.0V

V_IN=5.5V, V_CE=0.0V, V_OUT=0.0V

-0.1

-

0.1

μA

⑤

-0.1

V_CE=0.0V → 5.0V V_OUT=V_OUT(T)V × 0.9

After "H" is fed to CE, the time by when clocks are

generated at Lx pin.

Soft-start Time

t_SS

0.10

0.30

0.50

ms

③

Short Protection

Threshold

Sweeping V_OUT, V_OUTvoltage which Lx becomes “L”

level^(*6)

V_SHORT

R_DCHG

0.17

50

0.27

210

0.37

300

V

③

⑦

Voltage (Type B)

C_LDischarge (Type B)

V_CE=0V, V_OUT=4.0V

Ω

Unless otherwise stated, V_IN=5V, V_CE=5V, V_OUT(T)=Nominal Value,

NOTE:

^(*1)When the difference between the input and the output is small, 100% duty might come up and internal control circuits keep P-ch driver turning

on even though the output current is not so large.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

^(*2)Including UVLO detect voltage, hysteresis operating voltage range for UVLO release voltage.

(*3)

R

LXH

= (V_IN- Lx pin measurement voltage) / 100mA, R_LXL= Lx pin measurement voltage / 100mA

^(*4)Design value for the XC9261 series.

^(*5)Current limit denotes the level of detection at peak of coil current.

^(*6)"H"=V_IN~ V_IN- 1.2V, "L"=- 0.1V ~ + 0.1V

^(*7)AGND in the case of USP-6C.

6/28

XC9260/XC9261

Series

■ELECTRICAL CHARACTERISTICS (Continued)

SPEC Table

t_ONmin

NOMINAL

V_OUT

OUTPUT

f_OSC= 1.2MHz

<E-6>

f_OSC= 3.0MHz

<E-6>

VOLTAGE

<E-1> <E-2> <E-3> <C-1> <E-5>

<E-7>

MAX.

<E-5>

MIN.

<E-7>

MAX.

V_OUT(T)

MIN.

TYP.

MAX.

V_IN

MIN.

TYP.

0.80

0.85

0.90

0.95

1.00

1.05

1.10

1.15

1.20

1.25

1.30

1.35

1.40

1.45

1.50

1.55

1.60

1.65

1.70

1.75

1.80

1.85

1.90

1.95

2.00

2.05

2.10

2.15

2.20

2.25

2.30

2.35

2.40

2.45

2.50

2.55

2.60

2.65

2.70

0.784 0.800 0.816

0.833 0.850 0.867

0.882 0.900 0.918

0.931 0.950 0.969

0.980 1.000 1.020

1.029 1.050 1.071

1.078 1.100 1.122

1.127 1.150 1.173

1.176 1.200 1.224

1.225 1.250 1.275

1.274 1.300 1.326

1.323 1.350 1.377

1.372 1.400 1.428

1.421 1.450 1.479

1.470 1.500 1.530

1.519 1.550 1.581

1.568 1.600 1.632

1.617 1.650 1.683

1.666 1.700 1.734

1.715 1.750 1.785

1.764 1.800 1.836

1.813 1.850 1.887

1.862 1.900 1.938

1.911 1.950 1.989

1.960 2.000 2.040

2.009 2.050 2.091

2.058 2.100 2.142

2.107 2.150 2.193

2.156 2.200 2.244

2.205 2.250 2.295

2.254 2.300 2.346

2.303 2.350 2.397

2.352 2.400 2.448

2.401 2.450 2.499

2.450 2.500 2.550

2.499 2.550 2.601

2.548 2.600 2.652

2.597 2.650 2.703

2.646 2.700 2.754

2.70

2.75

2.83

2.92

3.00

3.08

3.17

3.25

3.33

3.42

3.50

3.58

3.67

3.75

3.83

3.92

4.00

4.08

4.17

4.25

4.33

4.42

4.50

173

184

194

205

216

227

238

248

259

270

281

292

302

313

324

335

346

350

247

262

278

293

309

324

340

355

370

386

401

417

432

448

463

478

494

500

321

341

361

381

401

421

441

461

481

502

522

542

562

582

602

622

642

650

71

119

121

122

123

130

136

142

148

154

160

167

173

179

185

191

198

200

166

169

171

172

160

169

177

185

193

201

209

217

225

233

241

249

257

260

72

73

74

86

91

95

99

104

108

112

117

121

125

130

134

138

140

7/28

XC9260/XC9261Series

■ELECTRICAL CHARACTERISTICS (Continued)

SPEC Table

t_ONmin

NOMINAL

V_OUT

OUTPUT

f_OSC=1.2MHz

<E-6>

f_OSC=3.0MHz

<E-6>

VOLTAGE

<E-1> <E-2> <E-3> <C-1> <E-5>

<E-7>

MAX.

<E-5>

MIN.

<E-7>

MAX.

V_OUT(T)

MIN.

TYP.

MAX.

V_IN

MIN.

TYP.

2.75

2.80

2.85

2.90

2.95

3.00

3.05

3.10

3.15

3.20

3.25

3.30

3.35

3.40

3.45

3.50

3.55

3.60

2.695 2.750 2.805

2.744 2.800 2.856

2.793 2.850 2.907

2.842 2.900 2.958

2.891 2.950 3.009

2.940 3.000 3.060

2.989 3.050 3.111

3.038 3.100 3.162

3.087 3.150 3.213

3.136 3.200 3.264

3.185 3.250 3.315

3.234 3.300 3.366

3.283 3.350 3.417

3.332 3.400 3.468

3.381 3.450 3.519

3.430 3.500 3.570

3.479 3.550 3.621

3.528 3.600 3.672

4.58

4.67

4.75

4.83

4.92

5.00

5.08

5.17

5.25

5.33

5.42

5.50

350

355

361

366

371

377

382

500

508

515

523

530

538

545

650

660

670

680

689

699

709

140

142

144

146

148

151

153

200

203

206

209

212

215

218

260

264

268

272

276

280

284

8/28

XC9260/XC9261

Series

■TEST CIRCUITS^(*1)

< Circuit No.① >

< Circuit No.② >

Wave Form Measure Point

L

V_IN

A

V_IN

A

L_X

V_OUT

CE

V

R_L

1μF

C_IN

C_L

AGND

PGND

AGND

PGND

※

External Components

※

External Components

f_OSC= 3.0MHz

L : 1.0μH(LQM2MPN1R0MGH)

f_OSC= 1.2MHz

L

: 4.7μH(LTF5022T-4R7N2R0-LC)

C_IN: 10μF(ceramic)

C_L: 10μF(ceramic)

C_IN: 10μF(ceramic)

C_L: 10μF(ceramic)

< Circuit No.④ >

< Circuit No.③ >

Wave Form Measure Point

V_IN

L_X

Rpulldown

200Ω

V_OUT

CE

V

I_LX

CE

1μF

1uF

AGND

PGND

AGND

PGND

R_LXH= (V_IN-V_Lx)/I_LX

R_LXL= V_Lx/I_LX

< Circuit No.⑤ >

< Circuit No.⑥ >

I_LeakH

A

Wave Form Measure Point

V_IN

L_X

V_IN

L_X

1μF

I_CEH

I_LIMH

I_LeakL

V_OUT

CE

A

CE

V

1μF

AGND

PGND

AGND

PGND

I_CEL

< Circuit No.⑦ >

B TYPE

V_IN

L_X

1μF

V_OUT

CE

A

AGND

PGND

^(*1)In the case of SOT-89-5, AGND and PGND are treated as V_SS

.

9/28

XC9260/XC9261Series

■TYPICAL APPLICATION CIRCUIT

* In the case of SOT-89-5, AGND and PGND are treated as V_SS

.

【Typical Examples】f_OSC=1.2MHz

MANUFACTURER

murata

PRODUCT NUMBER

VALUE

4.7μH

LQH5BPN4R7NT0L

LTF5022T-4R7N2R0-LC

XFL4020-472MEC

L

TDK

Coilcraft

【Typical Examples】f_OSC=3.0MHz

MANUFACTURER

murata

PRODUCT NUMBER

LQM2MPN1R0MGH

MAKK2016T1R0M

MLP2520K1R0M

VALUE

1.0μH

L

TAIYO YUDEN

TDK

(*1)

【Typical Examples】

f

=1.2MHz, f_OSC=3.0MHz

OSC

MANUFACTURER

murata

PRODUCT NUMBER

GRM155R61A106M

GRM21BR71A106KE51

LMK212AB7106MG

GRM155R61A106M

GRM21BR71A106KE51

LMK212AB7106MG

VALUE

10μF/10V

C_IN

murata

10μF/10V

TAIYO YUDEN

murata

10μF/10V

10μF/10V ^(*2)

C_L

murata

TAIYO YUDEN

^(*1)Select components appropriate to the usage conditions (ambient temperature, input & output voltage).

^(*2)C_L=20μF or more if V_IN- V_OUT(T)<1.5

・The relationship between Output Voltage, Input Voltage, and C_Lvalue

5.5

5.2

4.9

4.6

4.3

4.0

3.7

3.4

3.1

2.8

2.5

External components

C_L= 10μF

External components

C_L= 20μFꢀor more

Output Voltage (V)

10/28

XC9260/XC9261

Series

■OPERATIONAL EXPLANATION

The XC9260/XC9261 series consists of a reference voltage source, error amplifier, comparator, phase compensation, minimum

on time generation circuit, output voltage adjustment resistors, P-channel MOS driver transistor, N-channel MOS switching

transistor for the synchronous switch, current limiter circuit, UVLO circuit, thermal shutdown circuit, short protection circuit,

PWM/PFM selection circuit and others. (See the BLOCK DIAGRAM below.)

BLOCK DIAGRAM XC9260/XC9261 Series Type B (SOT-89-5)

The method is HiSAT-COT (High Speed circuit Architecture for Transient with Constant On Time) control, which features on

time control method and a fast transient response that also achieves low output voltage ripple.

The on time (t_on) is determined by the input voltage and output voltage, and turns on the Pch MOS driver Tr. for a fixed time.

During the off time (t_off), the voltage that is fed back through R1 and R2 is compared to the reference voltage by the error amp,

and the error amp output is phase compensated and sent to the comparator. The comparator compares this signal to the

reference voltage, and if the signal is lower than the reference voltage, sets the SR latch. On time then resumes. By doing this,

PWM operation takes place with the off time controlled to the optimum duty ratio and the output voltage is stabilized. The phase

compensation circuit optimizes the frequency characteristics of the error amp, and generates a ramp wave similar to the ripple

voltage that occurs in the output to modulate the output signal of the error amp. This enables a stable feedback system to be

obtained even when a low ESR capacitor such as a ceramic capacitor is used, and a fast transient response and stabilization of

the output voltage are achieved.

Generates an on time that depends on the input voltage and output voltage (t_on). The on time is set as given by the equations

below.

f

_OSC≒1.2MHz type

t_on(ns) = V_OUT/V_IN×833

f

t

_OSC≒3.0MHz type

_on(ns) = V_OUT/V_IN×333

The switching frequency can be obtained from the on time (t_on), which is determined by the input voltage and output voltage,

and the PWM controlled off time (t_off) as given by the equation below.

f_OSC(MHz) = V_OUT(V) / (V_IN(V)×t_on(ns))

<100% duty cycle mode>

When the load current is heavy and the voltage difference between input voltage and output voltage is small, 100% duty cycle

mode is activated and it keeps the Pch MOS driver Tr. keep on. 100% duty cycle mode attains a high output voltage stability and

a high-speed response under all load conditions, from light to heavy, even in conditions where the dropout voltage is low.

The error amp monitors the output voltage. The voltage divided by the internal R1 and R2 resistors is a feedback voltage for

Error Amp. and compared to the reference voltage. The output voltage of the error amp becomes higher when the feedback

voltage is higher than the reference voltage. The frequency characteristics of the error amp are optimized internally.

11/28

XC9260/XC9261Series

■OPERATIONAL EXPLANATION (Continued)

The reference voltage forms a reference that is used to stabilize the output voltage of the IC.

After “H” level is fed to CE pin, the reference voltage connected to the error amp increases linearly during the soft start interval.

This allows the voltage divided by the internal R1 and R2 resistors and the reference voltage to be controlled in a balanced

manner, and the output voltage rises in proportion to the rise in the reference voltage. This operation prevents rush input current

and enables the output voltage to rise smoothly.

If the output voltage does not reach the set output voltage within the soft start time, such as when the load is heavy or a large

capacity output capacitor is connected, the balancing of the voltage divided by the internal resistors R1 and R2 and the

reference voltage is lost, however, the current restriction function activates to prevent an excessive increase of input current,

enabling a smooth rise of the output voltage.

Regarding XC9260 which has PWM control method, it works with a continuous conduction mode, and operates at a stable

switching frequency by means of an on time (t_on) that is determined by the input voltage and output voltage regardless of the load.

Regarding XC9261 which has PWM/PFM auto switching control method, it works with a discontinuous conduction mode at

light loads, and lowers the switching frequency to reduce switching loss and improve efficiency.

Operation starts when “H” voltage is input into the CE pin. The IC can be put in the shutdown state by inputting “L” voltage into

the CE pin. In the shutdown state, the supply current of the IC is 0μA (TYP.), and the Pch MOS driver Tr. and Nch MOS switch

Tr. for synchronous rectification turn off. The CE pin is a CMOS input and the sink current is 0μA.

When the V_INvoltage becomes 2.00V (TYP.) or lower, the P-ch MOS driver transistor output driver transistor is forced OFF to

prevent false pulse output caused by unstable operation of the internal circuitry. When the V_INpin voltage becomes 2.10V

(TYP.) or higher, switching operation takes place. By releasing the UVLO function, the IC performs the soft start function to

initiate output startup operation. The UVLO circuit does not cause a complete shutdown of the IC,but causes pulse output to be

suspended; therefore, the internal circuitry remains in operation.

For protection against heat damage of the ICs, thermal shutdown function monitors chip temperature. The thermal shutdown

circuit starts operating and the P-ch MOS driver and N-ch MOS driver transistor will be turned off when the chip’s temperature

reaches 150℃. When the temperature drops to 120℃ or less after shutting of the current flow, the IC performs the soft-start

function to initiate output startup operation.

<Short-circuit protection function>

The B type short-circuit protection circuit protects the device that is connected to this product and to the input/output in

situations such as when the output is accidentally shorted to GND. The short-circuit protection circuit monitors the output

voltage, and when the output voltage falls below the short-circuit protection threshold voltage, it turns off the Pch MOS driver Tr

and latches it. Once in the latched state, operation is resumed by turning off the IC from the CE pin and then restarting, or by

re-input into the V_INpin.

<C_LHigh Speed Discharge>

The B type can quickly discharge the electric charge at the output capacitor (C_L) when a low signal to the CE pin which

enables a whole IC circuit put into OFF state, is inputted via the N-ch MOS switch transistor located between the V_OUTpin and

the GND pin. When the IC is disabled, electric charge at the output capacitor (C_L) is quickly discharged so that it may avoid

application malfunction.

Output Voltage Dischage characteristics

R_DCHG= 210 (TYP) C =10

F

μ

Ω

L

V=V_OUT(T)×e ^{– t /}

τ

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

t=τln (V_OUT(T)/ V)

-

V_OUT= 1.2V

V: Output voltage after discharge

V_OUT(T): Output voltage

t: Discharge time

V

_OUT= 1.8V

--

_OUT= 3.3V

---

V

τ: C_L×R_DCHG

C_L: Capacitance of Output capacitor

R

_DCHG: C^Lauto-discharge resistance,

but it depends on supply voltage.

0

2

4

6

8

10 12 14 16 18 20

Discharge Time: t(ms)

12/28

XC9260/XC9261

Series

■OPERATIONAL EXPLANATION (Continued)

The current limiter circuit of the XC9260/XC9261 series monitors the current flowing through the P-channel MOS driver transistor

connected to the Lx pin. When the driver current is greater than a specific level, the current limit function operates to turn off the

pulses from the Lx pin at any given timing. When the over current state is eliminated, the IC resumes its normal operation.

■NOTE ON USE

1. For the phenomenon of temporal and transitional voltage decrease or voltage increase, the IC may be damaged or

deteriorated if IC is used beyond the absolute MAX. specifications.

2. Spike noise and ripple voltage arise in a switching regulator as with a DC/DC converter. These are greatly influenced by

external component selection, such as the coil inductance, capacitance values, and board layout of external components.

Once the design has been completed, verification with actual components should be done.

3. The DC/DC converter characteristics depend greatly on the externally connected components as well as on the

characteristics of this IC, so refer to the specifications and standard circuit examples of each component when carefully

considering which components to select. Be especially careful of the capacitor characteristics and use B characteristics (JIS

standard) or X7R, X5R (EIA standard) ceramic capacitors.

4. Make sure that the PCB GND traces are as thick and wide as possible. The V_SSpin or PGND pin and AGND pin fluctuation

caused by high ground current at the time of switching may result in instability of the IC. Therefore, the GND traces close to

the V_SSpin, PGND pin and AGND pin are important.

5. Mount external components as close as possible to the IC. Keep the wiring short and thick to lower the wiring impedance.

6. A feature of HiSAT-COT control is that it controls the off time in order to control the duty, which varies due to the effects of

power loss. In addition, changes in the on time due to 100% duty cycle mode are allowed. For this reason, caution must be

exercised as the characteristics of the switching frequency will vary depending on the external component characteristics,

board layout, input voltage, output voltage, load current and other parameters.

7. Due to propagation delay inside the product, the on time generated by the minimum on time generation circuit is not the same

as the on time that is the ratio of the input voltage to the output voltage.

8. With regard to the current limiting value, the actual coil current may at times exceed the electrical characteristics due to

propagation delay inside the product.

9. The CE pin is a CMOS input pin. Do not use with the pin open. If connecting to the input or ground, use the resistor not more

than 1MΩ or less. To prevent malfunctioning of the device connected to this product or the input/output due to short circuiting

between pins, it is recommended that a resistor be connected.

10. In the B type, if the output voltage drops below the short circuit protection threshold voltage at the end of the soft start

interval, operation will stop.

11. Regarding XC9261 which has PWM/PFM auto switching control method, it works with a discontinuous conduction mode at

light loads, and in this case where the voltage difference between input voltage and output voltage is low or the coil

inductance is higher than the value indicated in the standard circuit example, the coil current may reverse when the load is

light, and thus pulse skipping will not be possible and light load efficiency will worsen.

12. When the voltage difference between input voltage and output voltage is low, the load stability feature may deteriorate.

13. Torex places an importance on improving our products and their reliability.We request that users incorporate fail-safe

designs and post-aging protection treatment when using Torex products in their systems.

13/28

XC9260/XC9261Series

■NOTE ON USE (Continued)

14. Instructions of pattern layouts

The operation may become unstable due to noise and/or phase lag from the output current when the wire impedance is high,

please place the input capacitor(C^IN) and the output capacitor (CL) as close to the IC as possible.

(1) In order to stabilize V_INvoltage level, we recommend that a by-pass capacitor (C_IN) be connected as close as possible to the

V_INpin, PGND pin and AGND pin.

(2) Please mount each external component as close to the IC as possible.

(3) Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit

impedance.

(4) Make sure that the GND traces are as thick as possible, as variations in ground potential caused by high ground currents at

the time of switching may result in instability of the IC.

(5) This series’ internal driver transistors bring on heat because of the output current and ON resistance of P-channel and

N-channel MOS driver transistors. Please consider the countermeasures against heat if necessary.

SOT-89-5

PCB mounted

^1stLayer

^2ndLayer

USP-6C

PCB mounted

^1stLayer

^2ndLayer

14/28

XC9260/XC9261

Series

■TYPICAL PERFORMANCE CHARACTERISTICS

(1) Efficiency vs. Output Current

XC9260A10D / XC9261A10D

XC9260A10C / XC9261A10C

L = LTF5022T-4R7N2R0-LC(4.7 H)

L = LQM2MPN1R0MGH(1.0 H)

μ

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

C = 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

μ μ

IN L

μ

IN

L

100

90

80

70

60

50

40

30

20

10

0

90

80

70

60

50

40

30

20

10

0

XC9261

XC9260

XC9261

XC9260

VIN = 5.0V

VIN = 3.7V

VIN = 5.0V

VIN = 3.7V

VIN = 5.0V

VIN = 3.7V

VIN = 5.0V

VIN = 3.7V

0.1

1

10

100

1000

10000

0.1

1

10

100

1000

10000

Output Current: I_OUT(mA)

XC9260A18D / XC9261A18D

XC9260A18C / XC9261A18C

L = LQM2MPN1R0MGH(1.0 H)

L = LTF5022T-4R7N2R0-LC(4.7 H)

μ

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

μ

100

90

80

70

60

50

40

30

20

μ

100

90

80

70

60

50

40

30

20

10

0

μ

IN

L

IN

L

XC9261

XC9260

VIN = 5.0V

VIN = 3.7V

XC9261

XC9260

VIN = 5.0V

VIN = 3.7V

VIN = 5.0V

VIN = 3.7V

VIN = 5.0V

VIN = 3.7V

10

0

0.1

1

10

100

1000

10000

0.1

1

10

100

1000

10000

Output Current: I_OUT(mA)

Output Current: IOUT (mA)

XC9260A33D / XC9261A33D

XC9260A33C / XC9261A33C

L = LQM2MPN1R0MGH(1.0 H)

L = LTF5022T-4R7N2R0-LC(4.7 H)

μ

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

μ

100

90

80

70

60

50

40

30

20

μ

100

90

80

70

60

50

40

30

20

μ

IN

L

IN

L

XC9261

XC9260

XC9261

XC9260

V_IN= 5.0V

10

0

10

0

0.1

1

10

100

1000

10000

0.1

1

10

100

1000

10000

Output Current: I_OUT(mA)

15/28

XC9260/XC9261Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(2) Output Voltage vs. Output Current

XC9261A18D

XC9261A33D

L = LQM2MPN1R0MGH(1.0 H)

μ

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

μ

IN

L

IN

L

3.60

2.00

3.50

3.40

3.30

3.20

3.10

3.00

1.90

1.80

1.70

1.60

V_IN= 5.0V

1000

V_IN= 3.7V

1000

0.1

1

10

100

10000

0.1

1

10

100

10000

Output Current: I_OUT(mA)

(3) Ripple Voltage vs. Output Current

XC9260A18D / XC9261A18D

L = LQM2MPN1R0MGH(1.0 H)

XC9260A33D / XC9261A33D

L = LQM2MPN1R0MGH(1.0 H)

μ

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

C = 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

μ μ

IN L

μ

IN

L

100

90

80

70

60

50

40

30

20

10

0

90

80

70

60

50

40

30

20

10

0

XC9261

XC9260

XC9261

XC9260

V_IN= 5.0V

V_IN= 3.7V

0.1

1

10

100

1000

10000

0.1

1

10

100

1000

10000

Output Current: I_OUT(mA)

XC9260A18C / XC9261A18C

XC9260A33C / XC9261A33C

L = LTF5022T-4R7N2R0-LC(4.7 H)

μ

L = LTF5022T-4R7N2R0-LC(4.7 H)

μ

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

μ μ

L

IN

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

μ μ

L

IN

100

90

80

70

60

50

40

30

20

10

0

90

80

70

60

50

40

30

20

10

0

XC9261

XC9260

XC9261

XC9260

V_IN= 3.7V

V_IN= 5.0V

0.1

1

10

100

1000

10000

0.1

1

10

100

1000

10000

Output Current: I_OUT(mA)

16/28

XC9260/XC9261

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(4) FB Voltage vs. Ambient Temperature

(5) UVLO Voltage vs. Ambient Temperature

XC9261B18D

XC9260A08D

2.00

1.95

1.90

1.85

1.80

1.75

1.70

1.65

1.60

3.0

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

V_IN= 3.7V

-50

-25

0

25

50

75

100

125

-50

-25

0

25

50

75

100

125

Ambient Temperature: Ta (

)

Ambient Temperature: Ta (

)

℃

(6) Quiescent Current vs. Ambient Temperature

XC9261A08D

XC9261A08C

100

90

80

100

90

80

70

60

50

40

30

20

10

0

70

60

50

40

30

20

10

0

V_IN= 5.0V, 3.7V, 2.7V

-50

-25

0

25

50

75

100

125

-50

-25

0

25

50

75

100

125

Ambient Temperature: Ta (

)

Ambient Temperature: Ta (

)

℃

XC9260A08D

XC9260A08C

1000

900

800

700

600

500

400

300

200

100

0

1000

900

800

700

600

500

400

300

200

100

0

V_IN= 5.0V

_IN= 3.7V

V_IN= 2.7V

V

V_IN= 5.0V

V_IN= 3.7V

V_IN= 2.7V

-50

-25

0

25

50

75

100

125

-50

-25

0

25

50

75

100

125

Ambient Temperature: Ta (

)

℃

Ambient Temperature: Ta (

)

℃

17/28

XC9260/XC9261Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(7) Stand-by Current vs. Ambient Temperature

(8) Oscillation Frequency vs. Ambient Temperature

XC9261A08D

XC9260A08D

L = LQM2MPN1R0MGH(1.0μH)

C_IN= 10μF(GRM155R61A106M) C_L= 10μF(GRM155R61A106M)

6.0

5.5

5.0

4.5

4.0

3.5

3.0

5.0

4.0

3.0

2.0

V_IN= 5.0V

2.5

2.0

1.5

1.0

V_IN= 5.0V

V_IN= 3.6V

V_IN= 3.7V, 2.7V

1.0

0.0

V

_IN= 3.0V

-50

-25

0

25

50

75

100

125

0.0

500.0

1000.0

1500.0

2000.0

Ambient Temperature: Ta (

)

Output Current: I_OUT(mA)

℃

XC9260A18D

XC9260A33D

L = LQM2MPN1R0MGH(1.0μH)

C_IN= 10μF(GRM155R61A106M) C_L= 10μF(GRM155R61A106M)

6.0

5.5

5.0

5.5

5.0

4.5

V_IN= 5.0V, 5.5V

V_IN= 5.0V, 3.6V

4.0

3.5

3.0

2.5

3.5

3.0

2.5

V_IN= 4.2V

V_IN= 3.0V

2.0

1.5

1.0

1.5

1.0

0.0

500.0

1000.0

1500.0

2000.0

0.0

500.0

1000.0

1500.0

2000.0

Output Current: I_OUT(mA)

XC9260A08C

XC9260A18C

L = LTF5022T-4R7N2R0-LC(4.7 H)

μ

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

μ

IN

L

IN

L

3.0

V_IN= 5.0V

V_IN= 3.6V

V_IN= 3.0V

2.5

2.0

1.5

1.0

0.5

0.0

2.5

2.0

1.5

1.0

0.5

0.0

V_IN= 5.0V, 3.6V

V_IN= 3.0V

0.0

500.0

1000.0

1500.0

2000.0

0.0

500.0

1000.0

1500.0

2000.0

Output Current: I_OUT(mA)

18/28

XC9260/XC9261

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(8) Oscillation Frequency vs. Ambient Temperature (Continued)

(9) Pch Driver ON Resistance vs. Ambient Temperature

XC9260A33C

XC9260A08D

L = LTF5022T-4R7N2R0-LC(4.7 H)

μ

C

= 10 F(GRM155R61A106M) C = 10 F(GRM155R61A106M)

μ μ

L

IN

3.0

300

250

200

150

100

50

2.5

2.0

1.5

1.0

0.5

0.0

V_IN= 5.0V, 5.5V

V_IN= 5.0V

V_IN= 3.7V

V_IN= 4.2V

V

_IN= 2.7V

0

0.0

500.0

1000.0

1500.0

2000.0

-50

-25

0

25

50

75

100

125

Output Current: I_OUT(mA)

Ambient Temperature: Ta (

)

℃

(10) Nch Driver ON Resistance vs. Ambient Temperature

XC9260A08D

(11) LxSW ”H” Leakage Current vs. Ambient Temperature

XC9260A08D

300

10.0

9.0

8.0

7.0

6.0

5.0

4.0

3.0

V_IN= 5.0V

250

200

150

100

50

V_IN= 3.7V

_IN= 2.7V

V

2.0

1.0

0.0

V_IN= 5.5V

0

-50

-25

0

25

50

75

100

125

-50

-25

0

25

50

75

100 125

Ambient Temperature: Ta (

)

℃

Ambient Temperature : Ta (

)

℃

(12) LxSW ”L” Leakage Current vs. Ambient Temperature

XC9260A08D

(13) CE ”H” Voltage vs. Ambient Temperature

XC9261A08D

10.0

9.0

8.0

7.0

6.0

5.0

4.0

1.4

1.2

1.0

0.8

0.6

V_IN= 5.5V

V_IN= 5.0V

0.4

3.0

2.0

1.0

0.0

V

_IN= 3.7V

V_IN= 2.7V

0.2

0.0

-50

-25

0

25

50

75

100

125

-50

-25

0

25

50

75

100

125

Ambient Temperature : Ta (

)

Ambient Temperature: Ta (

)

℃

19/28

XC9260/XC9261Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(14) CE”L” Voltage vs. Ambient Temperature

(15) Soft-Start Time vs. Ambient Temperature

XC9261A08D

XC9261B08D

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0

500

450

400

V_IN= 5.0V

350

300

250

200

150

100

50

V_IN= 5.0V

_IN= 3.7V

V_IN= 2.7V

V

0

-50

-25

0

25

50

75

100

125

-50

-25

0

25

50

75

100

125

Ambient Temperature: Ta (

)

Ambient Temperature: Ta (

)

℃

(16) Current Limit vs. Ambient Temperature

XC9261A08D

(17) CL Discharge Resistance vs. Ambient Temperature

XC9261B08D

4000

3800

3600

3400

3200

3000

2800

2600

2400

2200

2000

300

250

200

150

100

50

V_IN= 5.0V

V_IN= 3.7V

V

_IN= 2.7V

0

-50

-25

0

25

50

75

100

125

-50

-25

0

25

50

75

100

125

Ambient Temperature : Ta (

)

℃

Ambient Temperature: Ta (

)

℃

(18) Short Protection Threshold vs. Ambient Temperature

XC9261B08D

500

400

300

200

V_IN= 5.0V, 3.7V, 2.7V

100

0

-50

-25

0

25

50

75

100

125

Ambient Temperature: Ta (

)

℃

20/28

XC9260/XC9261

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(19) Load Transient Response

XC9260A12D

V_IN= 5.0V V_OUT= 1.2V f_OSC= 3.0MH

XC9261A12D

V_IN= 5.0V V_OUT= 1.2V f_OSC= 3.0MH

I

= 10mA

1.0A

I

= 10mA

1.0A

⇒

ｚ

⇒

ｚ

OUT

L = LQM2MPN1R0MGH(1.0 H) C = 10 F(GRM155R61A106M)

μ μ

IN

μ

IN

C = 10 F(GRM155R61A106M)

μ

L

I_OUT: 1.0A

I_OUT: 10mA

V_OUT: 50mV/div

50 s/div

μ

50 s/div

μ

XC9260A18D

V_IN= 5.0V V_OUT= 1.8V f_OSC= 3.0MH

XC9261A18D

V_IN= 5.0V V_OUT= 1.8V f_OSC= 3.0MH

I

= 10mA

1.0A

I

= 10mA

1.0A

⇒

ｚ

⇒

ｚ

OUT

L = LQM2MPN1R0MGH(1.0 H) C = 10 F(GRM155R61A106M)

μ μ

IN

μ

IN

C = 10 F(GRM155R61A106M)

μ

L

μ

L

I_OUT: 1.0A

I_OUT: 10mA

V_OUT: 50mV/div

50 s/div

μ

50 s/div

μ

XC9260A33D

V_IN= 5.0V V_OUT= 3.3V f_OSC= 3.0MH

XC9261A33D

V_IN= 5.0V V_OUT= 3.3V f_OSC= 3.0MH

I

= 10mA

1.0A

I

= 10mA

1.0A

⇒

ｚ

⇒

ｚ

OUT

L = LQM2MPN1R0MGH(1.0μH) C_IN= 10μF(GRM155R61A106M)

C_L= 10μF(GRM155R61A106M)

L = LQM2MPN1R0MGH(1.0μH) C_IN= 10μF(GRM155R61A106M)

C_L= 10μF(GRM155R61A106M)

I_OUT: 1.0A

I_OUT: 10mA

V_OUT: 50mV/div

50 s/div

μ

50 s/div

μ

21/28

XC9260/XC9261Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(19) Load Transient Response (Continued)

XC9260A12C

V_IN= 5.0V V_OUT= 1.2V f_OSC= 1.2MH

XC9261A12C

V_IN= 5.0V V_OUT= 1.2V f_OSC= 1.2MH

I

= 10mA

1.0A

I

= 10mA

1.0A

⇒

ｚ

⇒

ｚ

OUT

L = LTF5022T-4R7N2R0-LC(4.7μH) C = 10 F(GRM155R61A106M) L = LTF5022T-4R7N2R0-LC(4.7μH) C = 10 F(GRM155R61A106M)

μ

IN

C = 10 F(GRM155R61A106M)

μ

L

I_OUT: 1.0A

I_OUT: 10mA

V_OUT: 100mV/div

50 s/div

μ

50 s/div

μ

XC9260A18C

V_IN= 5.0V V_OUT= 1.8V f_OSC= 1.2MH

XC9261A18C

V_IN= 5.0V V_OUT= 1.8V f_OSC= 1.2MH

I

= 10mA

1.0A

I

= 10mA

1.0A

⇒

ｚ

⇒

ｚ

OUT

L = LTF5022T-4R7N2R0-LC(4.7μH) C = 10 F(GRM155R61A106M) L = LTF5022T-4R7N2R0-LC(4.7μH) C = 10 F(GRM155R61A106M)

μ

IN

C = 10 F(GRM155R61A106M)

μ

L

I_OUT: 1.0A

I_OUT: 10mA

V_OUT: 100mV/div

50 s/div

μ

50 s/div

μ

XC9260A33C

V_IN= 5.0V V_OUT= 3.3V f_OSC= 1.2MH

XC9261A33C

V_IN= 5.0V V_OUT= 3.3V f_OSC= 1.2MH

I

= 10mA

1.0A

I

= 10mA

1.0A

⇒

ｚ

⇒

ｚ

OUT

L = LTF5022T-4R7N2R0-LC(4.7 H) C = 10 F(GRM155R61A106M) L = LTF5022T-4R7N2R0-LC(4.7 H) C = 10 F(GRM155R61A106M)

μ

IN

C = 10 F(GRM155R61A106M)

μ

L

μ

L

I_OUT: 1.0A

I_OUT: 10mA

V_OUT: 200mV/div

50 s/div

μ

50 s/div

μ

22/28

XC9260/XC9261

Series

■PACKAGING INFORMATION

●USP-6C (unit:mm)

1.8±0.05

1pin INDENT

0.05

0.30±0.05

(0.1)

(0.50)

0.20±0.05

0.10±0.05

1.4±0.05

●SOT-89-5 (unit:mm)

4.5±0.1

+0.15

1.6

-0.2

+0.03

-0.02

0.42±0.06

2

0.4

4

5

Φ1.0

1

2

3

+0.03

-0.02

0.4

0.42±0.06

0.47±0.06

0.42±0.06

（1.7)

（1.6)

1.5±0.1

23/28

XC9260/XC9261Series

■PACKAGING INFORMATION (Continued)

●USP-6C Reference Pattern Layout (unit: mm)

●USP-6C Reference Metal Mask Design (unit: mm)

24/28

XC9260/XC9261

Series

■PACKAGING INFORMATION (Continued)

●

SOT-89-5 Power Dissipation

Power dissipation data for the SOT-89-5 is shown in this page.

The value of power dissipation varies with the mount board conditions.

Please use this data as the reference data taken in the following condition.

1. Measurement Condition

Condition: Mount on a board

Ambient: Natural convection

Soldering: Lead (Pb) free

Board: Dimensions 40 x 40 mm (1600 mm²in one side)

Copper (Cu) traces occupy 50% of the board area

In top and back faces

Package heat-sink is tied to the copper traces

Material: Glass Epoxy (FR-4)

Thickness: 1.6mm

Through-hole 5 x 0.8 Diameter

Evaluation Board (Unit: mm)

2. Power Dissipation vs. Ambient Temperature (105℃)

Board Mount (Tjmax=125℃)

Ambient Temperature (℃)

Power Dissipation Pd (mW)

Thermal Resistance (℃/W)

25

1300

260

76.92

105

Pd vs. Ta

Pd-Ta特性グラフ

1400

1200

1000

800

600

400

200

0

25

45

65

85

105

125

周囲温度Ta（℃）

Ambient Temperature: Ta (℃)

25/28

XC9260/XC9261Series

■PACKAGING INFORMATION (Continued)

●

USP-6C Power Dissipation

Power dissipation data for the USP-6C is shown in this page.

The value of power dissipation varies with the mount board conditions.

Please use this data as the reference data taken in the following condition.

1. Measurement Condition

Condition: Mount on a board

Ambient: Natural convection

Soldering: Lead (Pb) free

Board: Dimensions 40 x 40 mm (1600 mm²in one side)

Copper (Cu) traces occupy 50% of the board area

In top and back faces

Package heat-sink is tied to the copper traces

Material: Glass Epoxy (FR-4)

Thickness: 1.6mm

Through-hole 4 x 0.8 Diameter

Evaluation Board (Unit: mm)

2. Power Dissipation vs. Ambient Temperature (105℃)

Board Mount (Tjmax=125℃)

Ambient Temperature (℃)

Power Dissipation Pd (mW)

Thermal Resistance (℃/W)

25

1000

200

100.00

105

Pd vs. Ta

Pd-Ta特性グラフ

1200

1000

800

600

400

200

0

25

45

65

85

105

125

周囲温度Ta（℃）

Ambient Temperature: Ta (℃)

26/28

XC9260/XC9261

Series

■MARKING RULE

① represents products series

SOT89-5

MARK

PRODUCT SERIES

5

2

4

A

B

XC9260A*****-G, XC9261A*****-G

XC9260B*****-G, XC9261B*****-G

② represents integer and oscillation frequency of the output voltage

MARK

V_OUT(V)

XC9260 Series

XC9261 Series

1

2

3

f_OSC=1.2MlHz

f_OSC=3.0MlHz

f_OSC=1.2MlHz

f_OSC=3.0MlHz

0.x

1.x

2.x

3.x

A

B

C

D

E

F

N

P

R

U

V

X

Y

USP-6C

L

M

T

1

2

3

6

5

4

③ represents decimal number of the output voltage

V_OUT(V)

MARK

V_OUT(V)

MARK

X.00

X.10

X.20

X.30

X.40

X.50

X.60

X.70

X.80

X.90

0

1

2

3

4

5

6

7

8

9

X.05

X.15

X.25

X.35

X.45

X.55

X.65

X.75

X.85

X.95

A

B

C

D

E

F

H

K

L

M

④⑤ represents production lot number

01～09, 0A～0Z, 11～9Z, A1～A9, AA～AZ, B1～ZZ in order.

(G, I, J, O, Q, W excluded)

* No character inversion used.

27/28

XC9260/XC9261Series

1. The products and product specifications contained herein are subject to change without

notice to improve performance characteristics. Consult us, or our representatives

before use, to confirm that the information in this datasheet is up to date.

2. We assume no responsibility for any infringement of patents, patent rights, or other

rights arising from the use of any information and circuitry in this datasheet.

3. Please ensure suitable shipping controls (including fail-safe designs and aging

protection) are in force for equipment employing products listed in this datasheet.

4. The products in this datasheet are not developed, designed, or approved for use with

such equipment whose failure of malfunction can be reasonably expected to directly

endanger the life of, or cause significant injury to, the user.

(e.g. Atomic energy; aerospace; transport; combustion and associated safety

equipment thereof.)

5. Please use the products listed in this datasheet within the specified ranges.

Should you wish to use the products under conditions exceeding the specifications,

please consult us or our representatives.

6. We assume no responsibility for damage or loss due to abnormal use.

prior permission of TOREX SEMICONDUCTOR LTD.

28/28


型号：	XC9260A10CPR-G
厂家：	Torex Semiconductor
描述：	COT Control, 1.5A Synchronous Step-Down DC/DC Converters COT控制， 1.5A同步降压型DC / DC转换器转换器
文件：	总28页 (文件大小：1105K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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