APC12J03-9MAL Emerson Network Power, APC12J03-9MAL Datasheet - Page 11

• Manufacturer Part Number: APC12J03-9MAL
• Manufacturer: Emerson Network Power
• Type: Step Downr

Specifications of APC12J03-9MAL

• Number Of Outputs: 1
• Output Current: 12A
• Input Voltage: 3.3V
• Output Voltage: 0.9V
• Screening Level: Industrial
• Product Length (mm): 33.02mm
• Product Depth (mm): 16mm
• Mounting Style: Surface Mount
• Pin Count: 7
• Package / Case: SMT
• Lead Free Status / Rohs Status: Compliant

Trim Function (continued)
Method 2: External DC Source
By connecting an external DC supply across P4 (Enable) and P3 (GND) through a limiting resistor Rt, (see Figure 5), output
voltage adjustment can also be achieved. Equation 3 provides the relationship between the External DC supply, Vt, and Vo
(where Vo is the desired output voltage).
Given: Rt = 10kΩ
Vo Adjustment to Lower Voltages. This method does not limit the recommended lower Vo adjustment to 2% as mentioned
on previous sections re: Vo adjustment through external trim resistor.
Example:
Module version: APC08G03-9 (3V to 6Vin, 2.5Vo).
Requiring to adjust the output voltage from Vo = 2.5V to 1.8V
Vo = 1.8V, V
Example:
Module version: APC08G03-9 (3V to 6Vin, 2.5Vo).
Requiring to adjust the output voltage from Vo = 2.5V to 0.9V
Vo = 0.9V, V
Vo Adjustment to Higher Voltages
Example:
Module version: APC08G03-9 (3V to 6Vin, 2.5Vo).
Requiring to adjust the output voltage from Vo = 2.5V to 3.3V
Vo = 3.3V, V
If application of negative voltage is not desired, the limiting resistor Rt can either be changed to a lower value (Rt = 1kΩ Ω Ω Ω , such
that Vt = 0.60V per Equation 3), or use Method 1.
MODEL: APC12 SERIES
JANUARY 6, 2002 REVISION A (PRELIMINARY)
Vt
=



1
+
Rt
R
ref
ref
ref
1
+
= 0.87V, R
= 0.87V, R
= 0.87V, R
R
Rt
2



Vref
1
1
1
−
= 3.09kΩ, R
= 3.09kΩ, R
= 3.09kΩ, R
Rt
R
1
Vo
2
2
2
= 1.69kΩ (from Table 1). Based on Equation (3), Vt = 3.0V.
= 1.69kΩ (from Table 1). Based on Equation (3), Vt = 5.9V.
= 1.69kΩ (from Table 1). Based on Equation (3), Vt = -1.84V.
Technical Reference Notes
Equation (3)
APC12 Centauri II
Figure 5. External DC source for output trim adjust.
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