參數(shù)資料
型號(hào): L491333DIE2V
廠商: STMICROELECTRONICS
元件分類: 固定正電壓?jiǎn)温份敵鰳?biāo)準(zhǔn)穩(wěn)壓器
英文描述: 3.3 V FIXED POSITIVE REGULATOR, UUC
封裝: DIE
文件頁(yè)數(shù): 10/13頁(yè)
文件大?。?/td> 539K
代理商: L491333DIE2V
RHFL4913 FIXED VERSION
6/13
(*) This value is guaranteed by design. For each application it’s strongly recommended to comply with the maximum current limit of the pack-
age used.
Figure 4: Application Diagram For Remote Sensing Operation
DEVICE DESCRIPTION
The RHFL4913 Fixed Voltage contains a PNP type power element controlled by a signal resulting from
amplified comparison between the internal temperature compensated Band-Gap cell and the fraction of
the desired Output Voltage value. This fractional value is obtained from an internal-to-die resistor divider
bridge set by STMicroelectronics. The device is protected by several functional blocks.
Low pin count Package limitations
Some functions (INHIBIT, OCM, SENSE) are not available due to lack of pins. Corresponding die pads
are by default connected inside silicon.
SENSE pin
The Load voltage is applied by a Kelvin line connected to SENSE pin: Voltage feed-back comes from the
internal divider resistor bridge. Therefore possible output voltages are set by manufacturer mask metal
options. SENSE pin is not available in 3pin packages.
INHIBIT ON-OFF Control
By setting INHIBIT pin TTL-High, the Device switches off the Output Current and Voltage. The Device is
ON when INHIBIT pin is set Low. Since INHIBIT pin is internally pulled down, it can be left floating in case
Inhibit function is not utilized. INHIBIT pin is not available in 3pin packages.
Overtemperature protection
A temperature detector internally monitors the power element junction temperature. The Device goes
OFF at approx. 175°C, returning to ON mode when back to approx. 40°C. It is worth noting that when the
internal temperature detector reaches 175°C, the active power element can be at 225°C: Device reliability
cannot be granted in case of extensive operation under these conditions.
ISH
Shutdown Input Current
VINH = 5 V
15
A
VOCM
OCM Pin Voltage
Sinked IOCM = 24 mA active low
0.38
V
tPLH
tPHL
Inhibit Propagation Delay
(*)
VI = VO+2.5V, VINH = 2.4 V, IO = 400 mA
ON-OF
F
20
S
OFF-O
N
100
S
eN
Output Noise Voltage (*)
B= 10Hz to 100KHz
IO = 5mA to 2A
40
Vrms
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
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