ZXCT1009FTA Diodes Zetex, ZXCT1009FTA Datasheet - Page 4

• Manufacturer Part Number: ZXCT1009FTA
• Description: IC CURRENT MONITOR 1% SOT23-3
• Manufacturer: Diodes Zetex

Specifications of ZXCT1009FTA

• Function: Current Monitor
• Sensing Method: High-Side
• Accuracy: ±1%
• Voltage - Input: 2.5 ~ 20 V
• Current - Output: 10.2mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-3, TO-236-3, Micro3™, SSD3, SST3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ZXCT1009FTR

Typical Characteristics
Power Dissipation
The maximum allowable power dissipation of the device for
normal operation (P
ambient thermal resistance (θ
(T
expression:
P
The device power dissipation, P
P
ZXCT1009
Document number: DS33441 Rev. 12 - 2
MAX
D
JMAX
= I
OUT
= (T
), and ambient temperature (T
(V
JMAX
IN
-V
– T
OUT
AMB
MAX
) W
) / θ
), is a function of the package junction to
JA
JA
D
), maximum junction temperature
(cont.)
is given by the expression:
AMB
), according to the
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Application Information
The following text describes how to scale a load current
to an output voltage.
V
V
E.g.
A 1A current is to be represented by a 100mV output
voltage:
1) Choose the value of R
V
For example V
R
2) Choose R
V
Rearranging
R
R
SENSE
OUT
SENSE
SENSE
SENSE
OUT
OUT
= 0.01 x V
= V
= 0.1 / (0.1 x 0.01) = 100Ω
= V
> 500mV at full load.
= 100mV.
= 0.1/1.0 => 0.1Ω.
OUT
HIGH-SIDE CURRENT MONITOR
IN
OUT
1
/(V
- V
for Rout gives:
SENSE
SENSE
SENSE
LOAD
to give V
= 100mV at 1.0A.
x R
x 0.01)
SENSE
OUT
OUT
1
= 100mV, when
to give 50mV >
ZXCT1009
© Diodes Incorporated
April 2011