XC9503B093AR Torex Semiconductor Ltd, XC9503B093AR Datasheet - Page 11

• Manufacturer Part Number: XC9503B093AR
• Description: DUAL DC/DC CONVERT CONTROL 10PIN
• Manufacturer: Torex Semiconductor Ltd
• Type: Step-Down (Buck)r

Specifications of XC9503B093AR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 2
• Voltage - Output: 0.9 ~ 10 V
• Current - Output: 1A
• Frequency - Switching: 300kHz
• Voltage - Input: 2 ~ 10 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Power - Output: 150mW
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q5461699A

XC9503
Series
■NOTES ON USE
1. Checking for Intermittent Oscillation
The XC9503 series is subject to intermittent oscillation in the proximity of the maximum duty if the step-down ratio is low
(e.g., from 4.2 V to 3.3 V) or a heavy load is applied where the duty ratio becomes high. Check waveforms at EXT under
your operating conditions. A remedy for this problem is to raise the inductance of coil L or increase the load capacitance
C
.
L
2. PWM/PFM Automatic Switching
If PWM/PFM automatic switching control is selected and the step-down ratio is low (e.g, from 4.5V to 5.0V) or high (e.g.,
from 10 V to 1.0 V), the control mode remains in PFM setting over the whole load range, since the duty ratio under
continuous-duty condition is smaller than the PFM duty ratio of the XC9503 series. The output voltage's ripple voltage
becomes substantially high under heavy load conditions, with the XC9503 series appearing to be producing an abnormal
oscillation. If this operation becomes a concern, set pins PWM1 and PWM2 to High to set the control mode to PWM
setting. For use under the above-mentioned condition, measured data of PWM/PFM automatic switching control shown
on the data sheets are available up to I
= 100 mA.
OUT
3. Ratings
Use the XC9503 series and external components within the limits of their ratings.
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