XCL237/38/39/40/41/42/43/44 Series

Step-Down Micro DC/DC Converters with Integrated Inductor

Low Noise and Fast Transient Response with HiSAT-COT® control

Torex latest XCL Micro DC/DC include integrated Coils and utilise our proprietary HiSAT-COT control to deliver fast transient response and excellent voltage stability.  The small package size and internal Inductor mean designers are able to implement smaller, more cost-effective DC/DC circuits, that offer superior performance, much closer to their point of load.  The amount of external capacitance required can also be reduced significantly because of the fast transient response performance.

Low output voltage ripple has always been a cornerstone of Torex DC/DC design and these new families offer best in class performance.  In addition, EMI is measured well below the CISPR 32 thresholds, making these Micro DC/DC Converters ideal for noise sensitive applications.  

KEY ELECTRICAL PARAMETERS:

 SERIES XCL237/38 XCL239/40 XCL241/42 XCL243/44
Replaces XCL213/24 XC219/220 XCL221/22 XCL223/24
IOUT (max) 1.5 A 1.0 A 0.5 A 0.7 A

ON Resistance (Typ.)

P-Ch
0.14 Ω
0.24 Ω 0.14 A
N-Ch 0.10 Ω 0.16 Ω 0.10 A
VIN Range 2.5 V ~ 5.5 V
VOUT Range 0.8 V ~ 3.6 V, selectable in 0.05 V steps, ±2.0%
Switching Frequency 3.0 MHz 1.2 MHz 3.0 MHz
Switching Operation PWM XCL237 XCL239 XCL241 XCL243
PFM/PWM XCL238 XCL240 XCL242 XCL244
Quiescent Current (Typ.)  25 μA 25 μA 15 μA 25 μA
Standby Current (Typ.)    0.0μA
Protection Circuits Current Limit with Short Circuit protection and Thermal Shutdown (150 oC)
Other Features Soft-start, UVLO and CL Discharge
Amb. Op. Temp. Range -40 ~ 105 ºC
Package USP-9B01 CL-2025-02 USP-8B04
Dimensions (mm) 3.2 x 2.5 x 1.0 2.5 x 2.0 x 1.04 2.25 × 1.5 x 0.75

 

PACKAGES

 

USP-9B01

3.2 x 2.5 x 1.0mm

 

CL-2025-02

2.5 x 2.0 x 1.04mm

 

USP-8B04

2.25 x 1.5 x 0.75mm

 

 

TYPICAL APPLICATION CIRCUITS

USP-9B01

 

CL-2025-02

 

USP-8B04

 

 

EFFICIENCY vs. OUTPUT CURRENT

 

CIN & CL=10 μF (GRM188C81A106KA73)

 

CIN= 4.7 μF (GRM188C81A475ME11)
CL=10 μF (GRM188C81A106KA73)

 

LOAD TRANSIENT RESPONSE

 

VIN=5.0V, IOUT=10 mA↔1000 mA (tr, tf=5 μs)
CIN & CL=10 μF (GRM188C81A106KA73D)

 

VIN=3.8V, IOUT=1 mA↔500 mA (tr, tf=1 μs)
CIN= 4.7 μF (GRM188C81A475ME11)
CL=10 μF (GRM188C81A106KA73)

 

LOWER NEAR MAGNETIC FIELD AND EMI

  DC/DC + COIL
XC9288 3MHz
micro DC/DC
XCL240 3MHz
micro DC/DC
XCL242 1.2MHz
Evaluation
Board
 30MHz ~ 1GHz
Near Magnetic Field
CISPR32  (10m)
Radiation Noise

 

APPLICATION EXAMPLES

 

12 V / 24 V INPUT, EXAMPLE OF MULTIPLE POWER SUPPLIES

 

5V INPUT, EXAMPLE OF MULTIPLE POWER SUPPLIES

 

 

For further examples, click the images for more information.

 

5.0V POL SOLUTIONS

 

 

LI-ION BATTERY SOLUTIONS

 

 

12V/24V POL SOLUTIONS