Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- ELECTRICAL CHARACTERISTICS
- ELECTRICAL CHARACTERISTICS
- DEVICE INFORMATION
- PTH12030W TYPICAL CHARACTERISTICS (VI = 12 V)Characteristic data has been developed from actual products tested at 25C. This data is considered typical data for the converter. Applies to , , and .SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures. Derating limits apply to modules soldered directly to a 4 in. 4 in. double-sided PCB with 1 oz. copper. For surface mount products (AS and AZ suffix), multiple vias (plated through holes) are required to add thermal paths around the power pins. Please refer to the mechanical specification for more information. Applies to .
- PTH12030L TYPICAL CHARACTERISTICS (VI = 12 V)Characteristic data has been developed from actual products tested at 25C. This data is considered typical data for the converter. Applies to , , and .SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures. Derating limits apply to modules soldered directly to a 4 in. 4 in. double-sided PCB with 1 oz. copper. For surface mount products (AS and AZ suffix), multiple vias (plated through holes) are required to add thermal paths around the power pins. Please refer to the mechanical specification for more information. Applies to .
- APPLICATION INFORMATION
- TAPE AND REEL SPECIFICATIONS
- TRAY SPECIFICATIONS
Up
Dn
Sense
V =12V
I
V 1=3.3V
O
V 2=1.8V
O
I 2
O
ASIC
VCORE
VCCI O
PTH12010L
1
10
4
62
3
9
GND
Inhibit
7
Vadj
+
R1
2kW
R2
130 W
C2
330 Fm
C4
330 Fm
C6
0.68 Fm
C5
0.1 Fm
C3
330 Fm
C1
330 Fm
+
+
PTH12020W
7
10
4
5
62
3
9
Tra ck
V
I
V
I
V
O
V
O
GNDInhibit
1
Adjust
+
TL7702B
V
CC
GND
SENSE
RESIN
REF
CT
RESET
RESET
8
7
2
1
3
5
6
4
+
R5
10k0
R4
100kW
R3
11k0
8
8
Sense
Track
5
MARGIN UP/DOWN CONTROLS
D %
R orR =
U
D
499
-99.8kW
(2)
PTH12030W/L
www.ti.com
.................................................................................................................................................... SLTS211H – MAY 2003 – REVISED DECEMBER 2008
Figure 20. Application Circuit Demonstrating Prebias Startup
The PTH12060, PTH12010, PTH12020, and PTH12030 products incorporate Margin Up and Margin Down
control inputs. These controls allow the output voltage to be momentarily adjusted
[1]
, either up or down, by a
nominal 5%. This provides a convenient method for dynamically testing the operation of the load circuit over its
supply margin or range. It can also be used to verify the function of supply voltage supervisors. The ± 5% change
is applied to the adjusted output voltage, as set by the external resistor, R
SET
at the V
O
Adjust pin.
The 5% adjustment is made by pulling the appropriate margin control input directly to the GND terminal.
[2]
A
low-leakage open-drain device, such as an n-channel MOSFET or p-channel JFET is recommended for this
purpose.
[3]
Adjustments of less than 5% can also be accommodated by adding series resistors to the control
inputs. The value of the resistor can be selected from Table 6 , or calculated using the following formula.
MARGIN UP/DOWN ADJUST RESISTANCE CALCULATION
To reduce the margin adjustment to a value less than 5%, series resistors are required (See R
D
and R
U
in
Figure 21 ). For the same amount of adjustment, the resistor value calculated for R
U
and R
D
is the same. The
formula is as follows.
Where Δ % = The desired amount of margin adjust in percent.
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