XC9285/86/87/88/89 Series
Low Noise and Fast Transient Response with HiSAT-COT® control
5.5V, 1.0A~1.5A, Synchronous Step-Down DC/DC Converters
Compared to conventional PWM and PWM/PFM control, HiSAT-COT achieves much faster transient response and delivers excellent voltage stability. The amount of external capacitance required can also be reduced significantly because of the faster 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 DC/DC Converters ideal for noise sensitive applications. As a result, designers are able to implement smaller, cost-effective DC/DC circuits, that offer superior performance, much closer to their point of load.
KEY ELECTRICAL PARAMETERS:
| SERIES | XC9285  |
XC9286 |
XC9287 |
XC9288 |
XC9289 |
||
| Replaces | XC9257 | XC9258 | XC9260 | XC9261 | XC9262 | ||
| IOUT (max) | 1.0 A | 1.5 A | |||||
|
ON Resistance (Typ.) |
P-Ch |
0.24 Ω
|
0.14 Ω | 0.12 Ω | |||
| N-Ch | 0.16 Ω | 0.10 Ω | 0.09 Ω | ||||
| 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 | 1.2MHz | 1.2MHz or 3MHz | |||||
| Operation Mode | Fixed PWM | PWM/PFM | Fixed PWM | PWM/PFM |
Fixed PWM or PWM/PFM |
||
| Quiescent Current (Typ.) | 250 μA | 15 μA | 250 μA | 15 μA | 15 μA | ||
| Standby Current (Typ.) | 0.0 μA | ||||||
| Protection Functions | Current Limit with Short Circuit protection and Thermal Shutdown (150 ºC) | ||||||
| Other Functions | Soft-start, UVLO and CL Discharge | ||||||
| Inductor Value | 2.2μH | 2.2μH (1.2MHz) or 1.0μH (3MHz) | |||||
| Amb. Op. Temp. Range | -40 ~ 105 ºC | ||||||
| Standard Packages | USP-6C or SOT-25 | USP-6C or SOT-89-5 | LGA-8B01 | ||||
| Smallest Package (mm) | 1.8 x 2.0 x 0.6 | 1.2 x 1.4 x 0.3 | |||||
TYPICAL APPLICATION CIRCUITS
XC9285/86/87/88
XC9285/86 : 2.2μH
XC9287/88 : 1μH
XC9289
LOAD TRANSIENT RESPONSE FOR XC9289
VIN=5.0V, IOUT=10 mA↔1000 mA (tr, tf=5 μs)
L=1.0 μH (LSEUC2016KKT1R0M), CIN & CL=10 μF (GRM188C81A106KA73D)
EFFICIENCY vs. OUTPUT CURRENT FOR XC9289
L=2.2 μH (DFE252012F-2R2M), CIN & CL=10 μF (GRM188C81A106KA73D)
LOW ELECTROMAGNETIC INTERFERENCE (EMI)
XC9288, 3MHz in USP-6C
The use of ultra-small packaging and smaller external components with a compact footprint helps minimise the length of copper tracks on the PCB.
This results in extremely low radiated noise and excellent EMI performance as illustrated in the graph which shows that the XC9288 with 3MHz switching frequency, passes EN55032 (CISPR 32) CLASS B with good margin.
NEAR MAGNETIC FIELD (30MHz ~ 1GHz)
XC9288, 3MHz in USP-6C
SMALLEST PCB LAYOUT FOR XC9289
APPLICATION EXAMPLES
Click the images for more information.
5.0V POL SOLUTIONS
LI-ION BATTERY SOLUTIONS
12V/24V POL SOLUTIONS
PACKAGE AND PIN-OUT
USP-6C
(Bottom View)
XC9285/86
XC9287/88
1.8 x 2.0 x 0.6mm
SOT-25
(Top View)
XC9285/86
2.8 x 2.9 x 1.3mm
SOT-89-5
(Top View)
XC9287/88
4.5 x 4.6 x 1.6mm
LGA-8B01
(Bottom View)
XC9289
1.2 x 1.4 x 0.3mm