TCR5SB15U TOSHIBA Semiconductor CORPORATION, TCR5SB15U Datasheet - Page 7

• Manufacturer Part Number: TCR5SB15U
• Description: 200-ma Cmos Low-dropout Regulators Point Regulators
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Attention in Use
● Output Capacitors
● Mounting
● Permissible Loss
● Overcurrent Protection Circuit
3. Ripple Rejection
Ceramic capacitors can be used for these devices. However, because of the type of the capacitors, there might
be unexpected thermal features. Please consider application condition for selecting capacitors.
The long distance between IC and output capacitor might affect phase assurance by impedance in wire and inductor.
For stable power supply, output capacitor need to mount near IC as much as possible. Also GND pattern need to
be large and make the wire impedance small as possible.
Please have enough design patterns for expected maximum permissible loss.
surrounding temperature, input voltage, and output current etc, we recommend proper dissipation ratings for
maximum permissible loss; in general maximum dissipation rating is 70 to 80 percent.
Overcurrent protection circuit is designed in these products, but this does not assure for the suppression of uprising
device operation. If output pins and GND pins are shorted out, these products might be break down.
In use of these products, please read through and understand dissipation idea for absolute maximum ratings from
the above mention or our ‘Semiconductor Reliability Handbook’.
maximum ratings in any condition. Furthermore, Toshiba recommend inserting failsafe system into the design.
resistance rate of the power supply voltage, characteristic of Input Transient Response, the ripple rejection shows
an extremely superior characteristics. Therefore these devices are suitable for use as RF block for every cellular
phone system.
TCR5SBxxU series are designed for superior ripple rejection characteristic. Even an output changes with steep
90
80
70
60
50
40
30
20
10
0
10
Ripple rejection Ratio (TCR5SB30U)
100
Frequency f (Hz)
1 k
V IN = 4.0 V , I OUT = 10 mA
V ripple = 500 mV p − p
C IN = none, Ta = 25°C
C OUT = 2.2 μF
10 k
C OUT = 10 μF
C OUT = 1 μF
100 k 300 k
7
0
3.1 V
3.0 V
Input Transient Response (TCR5SB30U)
1
3.4 V
Then use these products under absolute
TCR5SB15U~TCR5SB50U
2
3
Time t (ms)
4
Ta = 25°C, C IN = 0.1 μF,
C out = 1μF,
V IN : 3.4 V → 3.1 V, I out = 50 mA
5
And under consideration of
6
Output Voltage
7
Input Voltage
8
2008-10-10
9
10