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參數(shù)資料
| 型號： | LM2788MMX-1.8 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 120mA High Efficiency Step-Down Switched Capacitor Voltage Converter |
| 中文描述： | SWITCHED CAPACITOR REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 372K |
| 代理商： | LM2788MMX-1.8 |
Electrical Characteristics
Limits in
boldface
type apply over the operating junction temperature range. Unless otherwise specified: 2.6
≤
V
IN
≤
5.5V,
V(EN) = V
IN
, C
1
= C
2
= 1μF, C
IN
= C
OUT
= 10μF. (Note 9) (Continued)
(Notes 2, 8) Limits in standard typeface and typical values apply for T
J
= 25
o
C.
Note 4:
Thermal shutdown circuitry protects the device from permanent damage.
Note 5:
The Human body model is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin. The machine model is a 200pF capacitor discharged
directly into each pin.
Note 6:
Maximum ambient temperature (T
A-MAX
) is dependent on the maximum operating junction temperature (T
= 125
o
C), the maximum power
dissipation of the device in the application (P
D-MAX
), and the junction-to ambient thermal resistance of the part/package in the application (
θ
), as given by the
following equation: T
A-MAX
= T
J-MAX-OP
- (
θ
JA
D-MAX
). The ambient temperature operating rating is provided merely for convenience. This part may be operated
outside the listed T
A
o
C.
Note 7:
Junction-to-ambient thermal resistance is a highly application and board-layout dependent. In applications where high maximum power dissipation exists,
special care must be paid to thermal dissipation issues. Fore more information on these topics, please refer to the
Power Dissipation
section of this datasheet.
Note 8:
All room temperature limits are 100% tested or guaranteed through statistical analysis. All limits at temperature extremes are guaranteed by correlation
using standard Statistical Quality Control methods (SQC). All limits are used to calculate Average Outgoing Quality Level (AOQL). Typical numbers are not
guaranteed, but do represent the most likely norm.
Note 9:
C
FLY
, C
IN
, and C
OUT
: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics
Note 10:
Nominal output voltage (V
OUT
(nom) ) is the target output voltage of the part, as given by the output-voltage-option identifier. See
Ordering Information
table for available options.
Note 11:
Efficiency is measured versus V
IN
, with V
IN
being swept in small increments from 3.0V to 4.2V. The average is calculated from these measurements
results. Weighting to account for battery voltage discharge characteristics (V
BAT
vs. Time) is not done in computing the average.
Note 12:
Turn-on time is measured from when the EN signal is pulled high until the output voltage crosses 90% of its final value.
Block Diagram
20044403
L
www.national.com
4
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