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參數(shù)資料
| 型號： | LA5679T |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.03 A SWITCHING CONTROLLER, 320 kHz SWITCHING FREQ-MAX, PDSO36 |
| 封裝： | 0.275 INCH, TSSOP-36 |
| 文件頁數(shù)： | 2/14頁 |
| 文件大?。?/td> | 199K |
| 代理商： | LA5679T |
LA5679T
No.7619-10/14
Typical circuit using VBIAS1
As the power to the output stage is supplied with VBAIASI, the application shown in the figure can be made. The
voltage of 5V stepped up with CH2 is applied to VBAIASI to obtain VO1 = 3.3V. This is stepped up/down against the
change of VCC = 2 to 4V.
* Use the emitter of external PNP and VBAIS1 on the same potential.
Typical use of VBISA1
Typical circuit using VBIAS2 (and VBIAS3)
As the power to the output stage is supplied with VBAIAS2, the application shown in the figure can be made. The
voltage of VO1 = 5V stepped up with CH1 is applied to VBAIAS2. As the voltage of about VBIAS2-1V is generated,
MOS transistor can be driven even when VBATT is low as shown in the typical circuit.
Typical VBIAS2 circuit
* Figure shows a case with VBIAS2 as well as for a case with VBIAS3.
During operation at low voltage (For VCC, VBIAS1 to 3, 1.8 V or less)
A circuit to turn OFF the output when detecting VCC and VBIAS1 to 3 during low voltage is not inserted. Turn OFF
the output in STBY below the operation range.
VBIAS1
OUT1
CAPH
ISET2
RSET2
VO1=3.3V
To IN1+
To OUT2
VBATT=2 to 4V
VO2=5V
To IN2-
Note: Use the emitter of external PNP
and VBIAS1 on the same potential.
CAPL
To VCC
To IN2+
VBATT=2V
VO2=3.3V
To OUT1
To VCC
VBIAS2
OUT2
SW
RSET
VO1
5V
To IN1+
VOUT2
MCH3406
10
H
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