UPD121A10 查看數據表（PDF） - NEC => Renesas Technology

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UPD121A10

2-POWER SUPPLY INPUT METHOD 1.0 V/2.0 A REGULATOR

NEC => Renesas Technology 

μ PD121A10

CIN : 0.1 μ F or higher. Be sure to connect CIN to prevent parasitic oscillation. Set this value according to the length

of the line between the regulator and the INPUT pin. Use of a film capacitor or other capacitor with first-rate

voltage and temperature characteristics is recommended. If using a laminated ceramic capacitor, it is

necessary to ensure that CIN is 0.1 μ F or higher for the voltage and temperature range to be used.

COUT : 10 μ F or higher. Be sure to connect COUT to prevent oscillation and improve excessive load regulation. Place

CIN and COUT as close as possible to the IC pins (within 1 to 2 cm). Use the capacitor whose capacitance value

is 10 μ F or more under use conditions.

D1 : If the OUTPUT pin has a higher voltage than the INPUT pin, connect a diode.

D2 : If the OUTPUT pin has a lower voltage than the GND pin, connect a Schottky barrier diode.

R1, R2: The total amount of R1 and R2 is sure to below 200 kΩ (100 kΩ TYP.).

VOUT = (1 + R1/R2) VREF Note

Note When VOUT = 1 V: R1 = 40 kΩ, R2 = 60 kΩ

Caution1. Make sure that no external voltage is applied to the OUTPUT pin.

2. VDD pins (Bias voltage) must be supplied in a separate power supply from that of INPUT pins (Input

voltage).

RECOMMENDED OPERATING CONDITIONS

Parameter

Input Voltage (VO = 1.0 V)

Symbol

MIN.

TYP.

MAX.

Unit

VIN

1.62 Note

2.0

2.65

V

Output Voltage

VO

0.95

1.0

1.15

V

Bias Voltage

VDD

Output Current

IO

Operating Ambient Temperature

TA

4.0

5.0

5.5

V

0

2.0

A

− 20

+ 85

°C

Operating Junction Temperature

TJ

− 20

+ 125

°C

Note It needs 1.7 V ≤ VIN ≤ 2.65 V to output IO = 2.0 A.

Caution1. Power on VIN first, and then VDD on start-up. When the power is turned off, turn off VDD first. Note

that the voltage of VDD must not be kept 3.0 V or less.

2. If absolute maximum rating is not exceeded, you can used this product above the recommended

operating range. However, since a margin with absolute maximum rating decreases, please use

this product after sufficient evaluation.

Data Sheet G18843EJ1V0DS

3

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