TI PT6915C

PT6910 Series
12 Watt 5V/3.3V Input
Plus to Minus Voltage Converter
SLTS113
(Revised 11/30/2000)
•
•
•
•
•
•
GaAs (-2.0V) ICs from an existing
+5.0V or +3.3V source.
These regulators are similar to
the popular PT6900 series with the
added feature of Power Trends’ unique
solderable copper case.
A 330µF electrolytic capacitor is
required on both the input and output
for proper operation. Also note that
this product does not include shortcircuit protection.
Single-Device: +5V/3.3V input
Remote Sense
+5V & +3.3V Input Voltage
Adjustable Output Voltage
23-pin Space-Saving Package
Solderable Copper Case
The PT6910 series is a series of
high performance 12 watt, plus to minus
voltage convertors that are designed to
power the latest ECL (–5.2V) and
Patent pending on package assembly
Pin-Out Information
Standard Application
V ADJ
Remote Sense
2
3-7
+VIN
+
Cin
22
PT6900
PT6910
9-15
16-21
-V OUT
8
Cout
+
GND
GND
Remote Sense
Cin = Required 330µF electrolytic
Cout = Required 330µF electrolytic
Ordering Information
Pin Function
Pin
Function
+5V Input
1
Do not connect
13
GND
2
Vout Adjust
14
GND
3
Vin
15
GND
PT6911o PT6914q = –2.0V
PT6912o PT6915q = –5.2V
PT6913q
= –1.5V
4
Vin
16
Vout
5
Vin
17
Vout
PT Series Suffix (PT1234X)
6
Vin
18
Vout
7
Vin
19
Vout
8
Remote Sense GND
20
Vout
9
GND
21
Vout
10
GND
22
Remote Sense Vout
Case/Pin
Configuration
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
11
GND
23
Do not connect
12
GND
+3.3V Input
Vout
N
A
C
(For dimensions and PC board layout,
see Package Styles 1300 and 1310.)
Specifications
PT6910 SERIES
Characteristics
(Ta= 25°C unless noted)
Symbols
Output Current
Io
Conditions
Ta = +25°C, natural convection
Vin =5.0V
Vo = –2.0V / –1.5V
Vo = –5.2V
Vin =3.3V
Vo = –2.0V
Vo = –5.2V
0.1A ≤ Io ≤ I max
Input Voltage Range
Output Voltage Tolerance
∆Vo
Output Adjust Range
Vo
Min
PT6911 PT6912/PT6913
PT6914/PT6915
Nominal Vin, Io = I max
0°C ≤ Ta ≤ +60°C
Pin 14 to Vo or GND
Vo = –2.0V
Vo = –5.2V
Vo = –1.5V
Typ
Max
—
—
—
—
6.0
3.5
5.0
2.5
4.5
3.1
—
—
5.5
3.6
V
Vo – 0.05
—
Vo + 0.05
V
–1.4
–2.7
–1.2
—
—
—
–4.4
–6.5
–3.4
V
0.1
0.1
0.1
0.1
(1)
(1)
(1)
(1)
Units
(2)
(2)
A
(2)
(2)
A
A
Line Regulation
Reg line
Over Vin range, Io =I max
—
±0.5
±1.0
%
Load Regulation
Regload
Vin =V nom, 0.1 ≤ Io ≤ Imax
—
±0.5
±1.0
%
Vo Ripple/Noise
Vn
Vin = V nom, Io =I max
Transient Response
with Cout = 330µF
ttr
Vos
Io step between 0.5xImax
Vo over/undershoot
Vo = –1.5V / –2.0V
Vo = –5.2V
and I max
—
—
—
—
40
50
200
200
—
—
—
—
Efficiency
η
Vin =+5V, Io =0.5xImax
Vo = –1.5V
Vo = –2.0V
Vo = –5.2V
—
—
—
65
70
77
—
—
—
%
Vo = –2.0V
Vo = –5.2V
—
—
67
75
—
—
%
Vin = +3.3V, I o =0.5xImax
Switching Frequency
ƒo
Absolute Maximum
Operating Temperature Range
Recommended Operating
Temperature Range
Ta
Ta
Storage Temperature
Ts
Weight
—
Over Vin and Io ranges
Over Vin Range
Vertical/Horizontal
Notes: (1) ISR-will operate down to no load with reduced specifications.
(2) See Safe Operating Area curves, or consult the factory for the appropriate derating.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
mV
µSec
mV
500
—
600
kHz
0
—
+85 (2)
°C
°C
0
—
+60
-40
—
+125
°C
—
26
—
grams
Typical Characteristics
PT6910 Series
12 Watt 5V/3.3V Input
Plus to Minus Voltage Converter
5.0V Input Voltage
3.3V Input Voltage
(See Note A)
Efficiency vs Output Current
(See Note A)
Efficiency vs Output Current
90
90
80
70
PT6912
PT6911
PT6913
60
Efficiency - %
Efficiency - %
80
PT6915
PT6914
70
60
50
40
50
0
1
2
3
4
5
0
6
1
2
Iout (A)
5
8
6
PT6912
PT6911
PT6913
4
Pd - Watts
6
Pd - Watts
4
Power Dissipation vs Output Current
Power Dissipation vs Output Current
8
PT6915
PT6914
4
2
2
0
0
0
1
2
3
4
5
0
6
1
2
3
4
5
Iout (A)
Iout (A)
50
3
Iout (A)
Ripple vs Output Current
Ripple vs Output Current
40
40
30
PT6912
PT6911
PT6913
20
Ripple - mV
Ripple - mV
30
PT6915
PT6914
20
10
10
0
0
0
1
2
3
4
5
0
6
1
2
PT6911 Safe Operating Area, Vin =5.0V
(See Note B)
4
5
PT6912 Safe Operating Area, Vin =5.0V
90.0
90.0
80.0
80.0
70.0
Airflow
200LFM
120LFM
60LFM
Nat conv
60.0
50.0
40.0
30.0
Ambient Temperature (°C)
Ambient Temperature (°C)
3
Iout (A)
Iout (A)
70.0
(See Note B)
Airflow
200LFM
120LFM
60LFM
Nat conv
60.0
50.0
40.0
30.0
20.0
20.0
0.0
1.0
2.0
3.0
Iout (A)
4.0
5.0
6.0
0.0
1.0
2.0
3.0
4.0
Iout (A)
Note A: All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the DC-DC Converter.
Note B: SOA curves represent the condition at which internal com-ponents are at or below manufacturere’s maximum operating temperature.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6900/6910 Series
The negative output voltage of the Power Trends PT6900
Series ISRs may be adjusted higher or lower than the
factory trimmed pre-set voltage with the addition of a
single external resistor. Table 1 gives the allowable
adjustment range for each model in the series as Va (min)
and Va (max).
Figure 1
22
Vo(sense)
Refer to Figure 1 and Table 2 for both the placement and value
of the required resistor, either (R1) or R2 as appropriate.
Notes:
1. Only a single 1% resistor is required in either the (R1) or
R2 location. Do not use (R1) and R2 simultaneously.
Place the resistor as close to the ISR as possible.
2. Never connect capacitors from Vo adjust to either GND,
Vout, or the Sense pins. Any capacitance added to the
Vo adjust pin will affect the stability of the ISR.
3. If the sense pins are not being used, the resistors (R1) and
R2 can be connected to Vout and GND respectively.
4. An increase in the output voltage must be accompanied by
a corresponding reduction in the maximum output current.
The revised maximum output current must be reduced to
the equivalent of 12Watts.
i.e.
Iout (max)
=
12
Va
PT6900/10
+Vin
GND
Vo(adj)
9 - 15
2
-Vo
16 - 21
Vout(-)
GND(sense)
8
(R1)
(Down)
+
Adjust Up: An increase in the output voltage is obtained
by adding a resistor R2, between pin 2 (Vo adjust) and
pin 8 (Remote Sense GND).
Adjust Down: Add a resistor (R1), between pin 2 (Vo adjust) and pin 22 (Remote Sense Vo).
3-7
+Vin
C in
R2
(Up)
+
Adjusting the Output Voltage of the PT6900/PT6910
Positive to Negative Converter Series
C out
COM
L
O
A
D
COM
The respective values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulas.
(R1)
=
R2
=
24.9 (Va – Vr)
– Rs kΩ
(Vo – Va)
24.9 Vr
– Rs
(Va – Vo)
kΩ
Where:
Vo
Va
Vr
Rs
= Original output voltage
= Adjusted output voltage
= Reference voltage in Table 1
= The resistance given in Table 1
Adc,
where Va is the adjusted output voltage.
Table1
PT6900/PT6910 ADJUSTMENT RANGE AND FORMULA PARAMETERS
Series Pt #
5.0V Bus
3.3V Bus
PT6903/13
PT6901/11
PT6904/14
PT6902/12
PT6905/15
Vo (nom)
Va (min)
-1.5V
-2.0V
-5.2V
-1.2V
-1.4V
-2.7V
Va (max)
Vr
-3.4V
-4.5V
-6.5V
-1.0V
-1.0V
-0.92V
Ω)
Rs (kΩ
12.7
10.0
17.4
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes continued
PT6900/6910 Series
Table 2
PT6900/PT6910 ADJUSTMENT RESISTOR VALUES
Series Pt #
5.0V Bus
3.3V Bus
Vo (nom)
Va (req’d)
PT6903/13
PT6901/11
PT6904/14
–2.0Vdc
–1.5Vdc
PT6902/12
PT6905/15
–5.2Vdc
Series Pt #
5.0V Bus
3.3V Bus
Vo (nom)
Va (req’d)
PT6901/11
PT6904/14
–2.0Vdc
PT6902/12
PT6905/15
–5.2Vdc
–1.2
(3.9)kΩ
–3.9
3.1kΩ
(39.7)kΩ
–1.3
(24.7)kΩ
–4.0
2.5kΩ
(46.5)kΩ
–1.4
(86.9)kΩ
(6.6)kΩ
–4.1
1.9kΩ
(54.6)kΩ
(14.9)kΩ
–4.2
1.3kΩ
(64.3)kΩ
(76.1)kΩ
–1.5
–1.6
236.0kΩ
(27.4)kΩ
–4.3
0.8kΩ
–1.7
112.0kΩ
(48.1)kΩ
–4.4
0.4kΩ
(90.9)kΩ
–1.8
70.3kΩ
(89.6)kΩ
-4.5
0.0kΩ
(106.0)kΩ
–1.9
49.6kΩ
(214.0)kΩ
–4.6
(135.0)kΩ
–2.0
37.1kΩ
–4.7
(171.0)kΩ
–2.1
28.8kΩ
239.0kΩ
–4.8
(224.0)kΩ
–2.2
22.9kΩ
115.0kΩ
–4.9
(313.0)kΩ
–2.3
18.4kΩ
73.0kΩ
–5.0
(491.0)kΩ
–2.4
15.0kΩ
52.3kΩ
–5.1
(1020.0)kΩ
–2.5
12.2kΩ
39.8kΩ
–5.2
–2.6
9.9kΩ
31.5kΩ
–5.3
212.0kΩ
–2.7
8.1kΩ
25.6kΩ
(0.3)kΩ
–5.4
97.1kΩ
–2.8
6.5kΩ
21.1kΩ
(2.1)kΩ
–5.5
59.0kΩ
–2.9
5.1kΩ
17.7kΩ
(4.0)kΩ
–5.6
39.9kΩ
–3.0
3.9kΩ
14.9kΩ
(6.1)kΩ
–5.7
28.4kΩ
–3.1
2.9kΩ
12.6kΩ
(8.5)kΩ
–5.8
20.8kΩ
–3.2
2.0kΩ
10.8kΩ
(11.0)kΩ
–5.9
15.3kΩ
–3.3
1.1kΩ
9.2kΩ
(13.8)kΩ
–6.0
11.2kΩ
–3.4
0.4kΩ
7.8kΩ
(16.9)kΩ
–6.1
8.1kΩ
–3.5
6.6kΩ
(20.4)kΩ
–6.2
5.5kΩ
–3.6
5.6kΩ
(24.3)kΩ
–6.3
3.4kΩ
–3.7
4.7kΩ
(28.7)kΩ
–6.4
1.7kΩ
–3.8
3.8kΩ
(33.8)kΩ
–6.5
0.2kΩ
R1 = (Blue)
R2 = Black
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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