TI PT6944C

Not Recommended For New Designs
PT6940 Series
6-A Dual Output 5-V/3.3-V Input
Integrated Switching Regulator
SLTS155B
Revised (4/8/2002)
Features
• Remote Sensing (Vo1 & Vo2)
• Soft-Start
• Short-Circuit Protection
(coordinated shutdown)
• 27-pin Space-Saving Package
• Solderable Copper Case
• High Efficiency Dual Output
(See Ordering Information)
•
•
•
•
•
•
Ideal Power Source for DSPs
5V/3.3V Input
6A Rated (Both Outputs)
Internal Power-up Sequencing
Single On/Off Control
Independent Adjust/Trim
Pin-Out Information
Ordering Information
Description
PT6941o = +3.3/2.5 Volts
PT6942o = +3.3/1.8 Volts
PT6943o = +3.3/1.5 Volts
PT6944o = +3.3/1.2 Volts
† PT6946o = +2.5/1.8 Volts
† PT6947o = +2.5/1.5 Volts
† PT6948o = +2.5/1.2 Volts
The PT6940 Excalibur™ power modules
are a series of high-efficiency dual-output
regulators, housed in a solderable spacesaving package. The dual output is ideal
for DSP applications that require a second
voltage source for a processor core.
Both outputs from the PT6940 regulator
modules are rated to deliver a full 6A load
current simultaneously, and are internally
sequenced to comply with the power-up
requirements of popular DSP ICs.
Each output can be independently
adjusted with a single external resistor, and
incorporates an output sense to compensate
for voltage drop between the regulator and
load. A short-circuit load fault at either
output will result in the coordinated
shutdown of both voltages.
† -Denotes models that will also operate off
3.3V input bus.
PT Series Suffix (PT1234x)
Case/Pin
Configuration
Vertical
Horizontal
SMD
Order
Suffix
Package
Code
N
A
C
(ENE)
(ENF)
(ENG)
(Reference the applicable package code drawing
for the dimensions and PC layout)
Pin Function
Pin
Function
1
STBY* †
15
Vin
2
Vo1 Adjust
16
Vin
3
Vo1 Sense
17
GND
4
Vo1
18
GND
5
Vo1
19
GND
6
Vo1
20
GND
7
GND
21
GND
8
GND
22
GND
9
GND
23
Vo2
10
GND
24
Vo2
11
GND
25
Vo2
12
GND
26
Vo2 Sense
13
Vin
27
Vo2 Adjust
14
Vin
† STBY* pin: Open = Outputs enabled
Ground = Outputs disabled
Standard Application
Vo1 Sense
STBY*
Vo2 Sense
1
VIN
13–16
3
330µF
+
4–6
Vo1
23–25
Vo2
PT6940
7–12
CIN
26
17–22
Co1
330µF
+ Co
2
+
L
O
A
D
330µF
L
O
A
D
Cin = Req’d 330µF * electrolytic
GND
GND
Co1/Co2 = Req’d 330µF * electrolytic
*300µF for Oscon® or low ESR tantalum
(see application notes)
For technical support and more information, see inside back cover or visit www.ti.com
Not Recommended For New Designs
PT6940 Series
6-A Dual Output 5-V/3.3-V Input
Integrated Switching Regulator
General Specifications
(Unless otherwise stated, Ta =25°C, Vin =5V, Cin =330µF, Co1 =330µF, Co 2 =330µF, and Io1/Io2 =Iomax)
Characteristic
Symbol
Output Current
Io
Input Voltage Range
Vin
Set Point Voltage Tolerance
Temperature Variation
Line Regulation
Load Regulation
Total Output Voltage Variation
Vo tol
Regtemp
Regline
Regload
∆Votot
Efficiency
Vo Ripple (pk-pk)
Transient Response
Short Circuit Threshold
Switching Frequency
STBY* (Pin 1)
Input High Voltage
Input Low Voltage
Input Low Current
Quiescent Current
External Output Capacitance
Operating Temperature Range
Storage Temperature
Mechanical Shock
η
Vr
ttr
∆Vtr
Isc(pk)
ƒo
VIH
V IL
IIL
Iin standby
Ta
Ts
Mechanical Vibration
Weight
Flammability
(1)
—
—
Conditions
Ta =25°C, natural convection
Ta =60°C, 200LFM airflow
Over Io Range
–40° ≤Ta ≤ +85°C, Io =Iomin
Over Vin range
Over Io range
Includes set-point, line, load,
–40° ≤Ta ≤ +85°C
Vin =5V, Io1 = Io2 =4A
Min
Vo1 ≤2.5V
Vo1 >2.5V
Vo =3.3V
Vo =2.5V
Vo =1.8V
Vo =1.5V
Vo =1.2V
PT6941
PT6942
PT6943
PT6944
PT6946
PT6947
PT6948
20MHz bandwidth
1A/µs load step, 50% to 100% Iomax
Vo over/undershoot
Reset followed by auto-recovery
Over Vin range
Referenced to GND (pin 7)
pin 1 to GND
Both outputs
Over Vin Range
—
Per Mil-STD-883D, Method 2002.3
1 msec, ½ Sine, mounted
Mil-STD-883D Method 2007.2,
Vertical
20-2000 Hz
Horizontal
Vertical/Horizontal
Meets UL 94V-O
PT6940 Series
Typ
Max
Units
0.1 (2)
0.1 (2)
3.1
4.5
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
300
—
—
—
—
±0.5
±0.5
±5
±5
±43
±35
±28
±25
±22
92
91
90
90
89
88
87
35
60
±70
13 (3)
350
6
6
5.5
5.5
±2
—
±10
±10
±100
±75
±54
±45
±36
—
—
—
—
—
—
—
—
—
—
—
400
—
–0.1
—
—
330
–40 (5)
—
—
-0.5
10
—
—
Open (4)
+0.4
–
20
TBD
+85 (6)
V
–40
—
+125
°C
—
—
—
—
TBD
TBD (7)
TBD (7)
34
—
—
—
—
G’s
Notes: (1)
(2)
(3)
(4)
A
V
%Vo
%Vo
mV
mV
mV
%
mVpp
µs
mV
A
kHz
mA
mA
µF
°C
G’s
grams
The outputs, Vo1 and Vo2, have similar characteristics. The applicable performance parameters are defined according to output voltage.
The minimum output current applies to each output. The module will operate at no load with reduced specifications.
A short-circuit load fault at either output causes the module to continuously reset, affecting both outputs.
The STBY* control (pin 1) has an internal pull-up, and if it is left open circuit the module will operate when input power is applied. The open-circuit voltage
is approximately the input voltage, Vin . Refer to the application notes for interface considerations.
(5) For operating temperatures below 0°C, Cin, Co1, and Co2 must have stable characteristics. Use either tantalum or Oscon® capacitors.
(6) See Safe Operating Area curves for the specific output voltage combination, or contact the factory for the appropriate derating.
(7) Only the case pins on through-hole pin configurations (N & A) must be soldered. For more information see the applicable package outline drawing.
Input/Output Capacitors: The PT6940 series requires a 330µF electrolytic capacitor at the input and both outputs for proper operation (300µF for Oscon® or low ESR
tantalum). In addition, the input capacitance must be rated for a minimum of 1.0Arms ripple current. For transient or dynamic load applications, additional capacitance
may be required. Refer to the application notes for more information.
For technical support and more information, see inside back cover or visit www.ti.com
Not Recommended For New Designs
PT6940 Series
6-A Dual Output 5-V/3.3-V Input
Integrated Switching Regulator
Performance Characteristics; Vin =5V
(See Note A)
Performance Characteristics; Vin =3.3V
Efficiency vs. Io1 & Io2 Load Currents
Efficiency vs. Io 1 & Io 2 Load Currents
100
100
95
95
90
PT6941
PT6942
PT6943
PT6944
PT6946
PT6947
PT6948
85
80
75
70
Efficiency - %
Efficiency - %
90
85
PT6946
PT6947
PT6948
80
75
70
65
65
60
60
0
1
2
3
4
5
0
6
1
2
35
35
30
30
PT6946
PT6947
PT6948
PT6941
PT6942
PT6943
PT6944
5
6
20
15
10
25
Vo1 Ripple - mV
25
Vo1 Ripple - mV
4
Vo1 Ripple vs. Io 1 & Io2 Load Currents
Vo1 Ripple vs. Io 1 & Io 2 Load Currents
20
PT6946
PT6947
PT6948
15
10
5
5
0
0
0
1
2
3
4
5
0
6
1
2
Iout (A) [Both Outputs]
3
4
5
6
Iout (A) [Both Outputs]
Vo2 Ripple vs. Io 1 & Io 2 Load Currents
Vo2 Ripple vs. Io 1 & Io2 Load Currents
35
35
30
30
25
25
PT6941
PT6946
PT6942
PT6947
PT6948
PT6943
PT5944
20
15
10
Vo2 Ripple - mV
Vo2 Ripple - mV
3
Iout (A) [Both Outputs ]
Iout (A) [Both Outputs]
20
PT6946
PT6947
PT6948
15
10
5
5
0
0
0
1
2
3
4
5
6
0
1
2
Iout (A) [Both Outputs]
3
4
5
6
Iout (A) [Both Outputs]
Power Dissipation Vs. Io1 & Io2 Load Currents
Power Dissipation vs. Io1 & Io2 Load Currents
5
5
4
4
Pd - Watts
Pd - Watts
(See Note A)
3
2
1
3
2
1
0
0
0
1
2
3
4
5
6
Iout (A) [Both Outputs]
0
1
2
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter.
For technical support and more information, see inside back cover or visit www.ti.com
3
4
Iout (A) [Both Outputs]
5
6
Not Recommended For New Designs
PT6940 Series
6-A Dual Output 5-V/3.3-V Input
Integrated Switching Regulator
Safe Operating Area Curves; Vin =5V
(See Note B)
Safe Operating Area Curves; Vin =3.3V/5V
PT6946 (2.5V/1.8V)
90
90
80
80
Airflow
70
200LFM
120LFM
60LFM
Nat conv
60
50
40
Ambient Temperature (°C)
Ambient Temperature (°C)
PT6941 (3.3V/2.5V)
30
Airflow
70
200LFM
120LFM
60LFM
Nat conv
60
50
40
30
20
20
0
1
2
3
4
5
6
0
1
Iout (A) [Both Outputs]
3
4
5
6
PT6947 (2.5V/1.5V)
PT6942 (3.3V/1.8V)
90
80
80
Airflow
70
200LFM
120LFM
60LFM
Nat conv
60
50
40
Ambient Temperature (°C)
Ambient Temperature (°C)
2
Iout (A) [Both outputs]
90
30
Airflow
70
200LFM
120LFM
60LFM
Nat conv
60
50
40
30
20
20
0
1
2
3
4
5
6
0
1
Iout (A) [Both Outputs]
2
3
4
5
6
Iout (A) [Both Outputs]
PT6948 (2.5V/1.2V)
PT6943 (3.3V/1.5V)
90
90
80
80
Airflow
70
200LFM
120LFM
60LFM
Nat conv
60
50
40
30
Ambient Temperature (°C)
Ambient Temperature (°C)
(See Note B)
Airflow
70
200LFM
120LFM
60LFM
Nat conv
60
50
40
30
20
20
0
1
2
3
4
5
6
0
Iout (A) [Both Outputs]
1
2
3
4
5
6
Iout (A) [Both Outputs]
PT6944 (3.3V/1.2V)
90
Ambient Temperature (°C)
80
Airflow
70
200LFM
120LFM
60LFM
Nat conv
60
50
40
30
20
0
1
2
3
4
5
6
Iout (A) [Both Outputs]
Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures
For technical support and more information, see inside back cover or visit www.ti.com
Not Recommended For New Designs
Application Notes
PT6940 Series
Operating Features of the PT6940 Series
of Dual-Output Voltage Regulators
Over-Current Protection
The PT6940 series of regulators incorporate independent
current limit protection at both outputs (Vo1 & Vo2) with a
periodic shutdown of both outputs. Applying a load current,
in excess of the current limit threshold to either output,
results in the shutdown of both voltages after a short
period; typically 15ms. Following shutdown the module
periodically attempts to recover by executing a soft start
power-up at intervals of approximately 100ms. If the overcurrent fault persists, each attempted restart will result in a
corresponding over-current trip and shutdown. During
the 15ms period prior to each successive shutdown, the
output with the load fault may not reach full regulation.
Standby Control
The output voltages from the PT6940 may be disabled
using the regulator’s Standby control. The standby function
is provided by the “STBY*” control (pin 1). If pin 1 is left
open-circuit the regulator operates normally, and provides
a regulated output at both Vo1 (pins 4–6) and Vo2 (pins 23–
25) whenever a valid input source voltage is applied to Vin
(pins 13–16) with respect to GND (pins 7-12 & 17–22).
Applying a low-impedance sink to ground1 at pin 1, simultaneously disables both regulated outputs. This places the
regulator in standby mode, and reduces the input current
drawn by the ISR to typically 10mA. The Standby control
may also be used to maintain both regulator outputs at zero
volts during the period that input power is applied.
Power-Up Voltage Sequencing
The output voltages from the PT6940 series regulators are
independently regulated, and internally sequenced to meet
the power-up requirements of popular microprocessors
and DSP chipsets. Figure 1 shows the output voltage waveforms of a PT6942 (3.3V/1.8V) after either input power is
applied, or the regulator is enabled. In this example turning
Q1 off in Figure 2, removes the low-voltage signal at pin 1
and enables the regulator. Following a delay of about 3–5ms,
Vo1 and Vo2 rise together until the lower voltage, Vo2,
reaches its regulation voltage. Vo1 then continues to rise
until both outputs reach full regulation. The total powerup time is less than 15ms, and is relatively independent of
load, temperature, and output capacitance. The turn-off of
Q1 corresponds to the rise in VSTBY. The waveforms were
measured with a 5V input voltage, and with resistive loads
of 4A at both the Vo1 and Vo2 outputs.
The standby pin is ideally controlled using an open-collector
(or open-drain) discrete transistor (See Figure 2). The
open-circuit voltage is the input voltage, Vin.
Figure 1
V1 (1V/Div)
V2 (1V/Div)
Vstby (5V/Div)
Figure 2
3
26
V1 Sns
V2 Sns
Vo1
V in
13–16
PT6940
Vin
Vo 1
23–25
Vo 2
V2 Adj V1 Adj
STBY*
1
Vo2
4–6
7–12
17–22
27
2
+
CIN
+
Q1
BSS138
Co1
+
Co2
Inhibit
COM
COM
Notes:
1. The standby control input is Not compatible with TTL or
other devices that incorporate a totem-pole output drive. Use
only a true open-collector device, preferably a discrete bipolar
transistor (or MOSFET). To ensure the regulator output is
disabled, the control pin must be pulled to less than 0.4Vdc
with a low-level 0.5mA sink to ground.
2 Do not use an an external pull-up resistor. The control pin
has its own internal pull-up. Adding an external pull-up
could disable the over-current protection. The open-circuit
voltage of the “STBY*” pin is the input voltage, Vin.
HORIZ SCALE (2ms/Div)
For technical support and more information, see inside back cover or visit www.ti.com
Not Recommended For New Designs
Notes
PT6940 Series
Capacitor Recommendations for the
Dual-Output PT6940 Regulator Series
Input Capacitor:
The recommended input capacitance is determined by 1.0
ampere minimum ripple current rating and 330µF minimum
capacitance (300µF for Oscon® or low ESR tantalum).
Ripple current and <100mΩ equivalent series resistance
(ESR) values are the major considerations, along with temperature, when designing with different types of capacitors.
Tantalum capacitors have a recommended minimum voltage
rating of twice the maximum DC voltage + AC ripple. This
is necessary to insure reliability for input voltage bus applications
Output Capacitors: Co1/Co2
The ESR of the required capacitors, Co1 & Co2 must not be
greater than 150mΩ. Electrolytic capacitors have poor
ripple performance at frequencies greater than 400kHz
but excellent low frequency transient response. Above the
ripple frequency, ceramic capacitors are necessary to improve
the transient response and reduce any high frequency noise
components apparent during higher current excursions.
Preferred low ESR type capacitor part numbers are identified
in Table 1.
Tantalum Capacitors
Tantalum type capacitors can be used for the output but only
the AVX TPS series, Sprague 593D/594/595 series or Kemet
T495/T510 series. These capacitors are recommended
over many other tantalum types due to their higher rated
surge, power dissipation, and ripple current capability. As a
caution the TAJ series by AVX is not recommended. This
series has considerably higher ESR, reduced power dissipation, and lower ripple current capability. The TAJ series is
less reliable than the AVX TPS series when determining
power dissipation capability. Tantalum or Oscon® types
are recommended for applications where ambient temperatures fall below 0°C.
Capacitor Table
Table 1 identifies the characteristics of capacitors from a
number of vendors with acceptable ESR and ripple current
(rms) ratings. The number of capacitors required at both the
input and output buses is identified for each capacitor type.
This is not an extensive capacitor list. Capacitors from other
vendors are available with comparable specifications. Those listed
are for guidance. The RMS ripple current rating and ESR
(Equivalent Series Resistance at 100kHz) are critical parameters
necessary to insure both optimum regulator performance and
long capacitor life.
Table 1: Input/Output Capacitors
Capacitor
Vendor/
Component
Series
Capacitor Characteristics
Quantity
Working
Voltage
Value(µF)
(ESR) Equivalent
Series Resistance
85°C Maximum Ripple
Current(Irms)
Physical
Size(mm)
Input
Bus
Output
Bus
Panasonic
FC
25V
35V
35V
560µF
390µF
330µF
0.0065Ω
0.065Ω
0.117Ω
1205mA
1205mA
555mA
12.5x15
12.5x15
8x11.5
1
2
N/R
1
1
1
EEUFC1E561S
EEUFC1V391S
EEUFC1C331
United
Chemi-Con
LXV/FS/
LXZ
16V
35V
10V
20V
330µF
470µF
330µF
150µF
0.120Ω
0.052Ω
0.025Ω
0.030÷2 Ω
555mA
1220mA
3500mA
3200mA
8x12
10x20
10x10.5
10x10.5
N/R
1
1
2
1
1
1
2
LXZ16VB331M8X12LL
LXZ35VB471M10X20LL
10FS330M
20FS150M
Nichicon
PL/ PM
35V
35V
50V
560µF
330µF
470µF
0.048Ω
0.065÷2 Ω
0.046Ω
1360mA
1020mA
1470mA
16x15
12.5x15
18x15
1
1
1
1
1
1
UPL1V561MHH6
UPL1V331MHH6
UPM1H4711MHH6
Panasonic
FC
(Surface Mtg)
10V
35V
16V
1000µF
330µF
330µF
0.043Ω
0.065Ω
0.150Ω
1205mA
1205mA
670mA
12x16.5
12.5x16
10x10.2
1
1
N/R
1
1
1
EEVFC1A102LQ
EEVFC1V331LQ
EEVFC1C331P
Oscon- SS
SV
10V
10V
20V
330µF
330µF
150µF
0.025Ω
0.025Ω
0.024÷2 Ω
>3500mA
>3800mA
3600mA
10.0x10.5
10.3x10.3
10.3x10.3
1
1
2
1
1
2
10SS330M
10SV300M
20SV150M
SV= Surface Mount
AVX
Tantalum
TPS
10V
10V
10V
330µF
330µF
220µF
0.100÷2 Ω
0.100÷2 Ω
0.095Ω
>2500mA
>3000mA
>2000mA
7.3Lx
4.3Wx
4.1H
2
2
2
1
1
2
TPSV337M010R0100
TPSV337M010R0060
TPSV227M0105R0100
10V
10V
330µF
220µF
0.033Ω
0.07Ω÷2 =0.035Ω
1400mA
>2000mA
7.3Lx5.7W
x 4.0H
2
2
1
2
T510X337M010AS
T495X227M010AS
10V
10V
330µF
220µF
0.045Ω
0.065Ω
2350mA
>2000mA
7.3Lx
6.0Wx
4.1H
2
2
1
2
4D337X0010R2T
594D227X0010D2T
Kemet
T510/
T495
Sprague
594D
Vendor Number
N/R –Not recommended. The voltage rating does not meet the minimum operating limits.
For technical support and more information, see inside back cover or visit www.ti.com
Not Recommended For New Designs
Application Notes
PT6940 Series
Adjusting the Output Voltages of the
PT6940 Dual-Output ISRs
Each output voltage from the PT6940 series of integrated
switching regulators (ISRs) can be independently adjusted
higher or lower than the factory trimmed pre-set voltage.
The voltages, Vo1 and Vo2 may each be adjusted either up
or down using a single external resistor 1. Table 1 gives the
adjustment range for both Vo1 and Vo2 for each model in
the series as Va(min) and Va(max). Note that Vo2 must
always be lower than Vo1 2.
Where: Vo = Original output voltage, (Vo1 or Vo2)
Va = Adjusted output voltage
Rs = The series resistance from Table 1
Notes:
1. Use only a single 1% resistor in either the (R1) or R2
location to adjust Vo1, and in the (R3) or R4 location to
adjust Vo2. Place the resistor as close to the module as
possible.
Vo1 Adjust Up: To increase the output, add a resistor R2
between pin 2 (Vo1 Adjust) and pins 7-12 (GND) 3.
2. Vo2 must always be at least 0.3V lower than Vo1.
3. When adjusting Vo1 higher than the factory pre-set
output voltage the minimum input voltage must be
revised as follows.
Vo1 Adjust Down: Add a resistor (R1), between pin 2
(Vo1 Adjust) and pin 3 (Vo1 Sense).
Vo2 Adjust Up: Add a resistor R4 between pin 27
(Vo2 Adjust) and pins 17–22 (GND).
Vo1 =3.3V:
Vin(min) = (Vo1 + 1)V or 4.5V, whichever is greater.
Vo2 Adjust Down: Add a resistor (R3) between pin 27
(Vo2 Adjust) and pin 26 (Vo2 Sense).
Vo1 =2.5V:
Vo1 =2.5V is the maximum output voltage allowed for
operation off a 3.3V input bus. If Vo1 is adjusted above
2.5V, the input voltage must be a minimum of 4.5V.
Refer to Figure 1 and Table 2 for both the placement and value of
the required resistor.
4. Vo1 and Vo2 may be adjusted down to an alternative bus
voltage by making, (R1) or (R3) respectively, a zero ohm
link. Refer to the Table 1 footnotes for guidance.
The adjust up and adjust down resistor values can also be
calculated using the following formulas. Be sure to select
the correct formula parameter from Table 1 for the output
and model being adjusted.
(R1) or (R3)
=
R2 or R4
=
10 (Va – 0.9 )
Vo – Va
9
Va – Vo
– Rs
kΩ
– Rs
kΩ
5. Never connect capacitors to either the Vo1 Adjust or
Vo2 Adjust pins. Any capacitance added to these control
pins will affect the stability of the respective regulated
output.
Figure 1
Vo 1 Sense
Vo 2 Sense
3
26
V 1 Sns
V 2 Sns
Vo 1
V IN
13–16
Vo 1
4–6
PT6940
Vin
Vo 2
Vo 2
23–25
V2 Adj V1 Adj
7–12
17–22
27
2
(R1)
(R3)
+
+
+
CIN
Co 1
R2
GND
For technical support and more information, see inside back cover or visit www.ti.com
Co 2
L
O
A
D
R4
GND
L
O
A
D
Not Recommended For New Designs
Application Notes
PT6940 Series
Table 1
ADJUSTMENT RANGE AND FORMULA PARAMETERS
Vo1 Bus
Series Pt #
Adj. Resistor
Vo(nom)
Va(min)
Va(max)
Ω)
Rs (kΩ
Ref. Note 4:
PT6941/42/43/44
(R1)/R2
PT6946/47/48
(R1)/R2
3.3V
2.5V *
3.5V
20.0
2.5V
1.8V *
2.5V
13.0
PT6941/42/43/44
(R1)/R2
PT6946/47/48
(R1)/R2
3.3V
2.5V
Vo2 Bus (2)
PT6941
(R3)/R4
PT6942/46
(R3)/R4
PT6943/47
(R3)/R4
PT6944/48
(R3)/R4
2.5V
1.8V *
3.1V
13.0
1.8V
1.5V *
2.2V
20.0
1.5V
1.2V *
2.4V
10.0
1.2V
1.15V
1.5V †
29.4
Vo2 Bus
Series Pt #
Adj. Resistor
PT6941
(R3)/R4
PT6942/46
(R3)/R4
PT6943/47
(R3)/R4
PT6944/48
(R3)/R4
2.5V
1.8V
1.5V
1.2V
* (R1) = Zero-ohm link
†(R3) = Zero-ohm link
Table 2
ADJUSTMENT RESISTOR VALUES
Vo1 Bus
Series Pt #
Adj. Resistor
Vo(nom)
Va(req’d)
1.8
1.85
1.9
1.95
2.0
2.05
2.1
2.15
2.2
2.25
2.3
2.35
2.4
2.45
2.5
2.55
2.6
2.65
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
(0.0)
(1.6)kΩ
(3.7)kΩ
(6.1)kΩ
(9.0)kΩ
(12.6)kΩ
(17.0)kΩ
(22.7)kΩ
(30.3)kΩ
(41.0)kΩ
(57.0)kΩ
(83.7)kΩ
(137.0)kΩ
(297.0)kΩ
(0.0)kΩ
(2.0)kΩ
(4.3)kΩ
(6.9)kΩ
(10.0)kΩ
(13.6)kΩ
(18.0)kΩ
(23.3)kΩ
(30.0)kΩ
(38.6)kΩ
(50.0)kΩ
(90.0)kΩ
(210.0)kΩ
70.0kΩ
25.0kΩ
10.0kΩ
2.5kΩ
167.0kΩ
77.0kΩ
47.0kΩ
32.0kΩ
23.0kΩ
#
#
#
#
#
Vo(nom)
Va(req’d)
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
1.55
1.6
1.65
1.7
1.75
1.8
1.85
1.9
1.95
2.0
2.05
2.1
2.15
2.2
2.25
2.3
2.35
2.4
2.45
2.5
2.55
2.6
2.65
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.1
(20.6)kΩ
(0.0)kΩ
(4.0)kΩ
(10.0)kΩ
(20.0)kΩ
(40.0)kΩ
(100.0)kΩ
(0.0)kΩ
(6.0)kΩ
(15.0)kΩ
(30.0)kΩ
(60.0)kΩ
(150.0)kΩ
(0.0)kΩ
(1.6)kΩ
(3.7)kΩ
(6.1)kΩ
(9.0)kΩ
(12.6)kΩ
(17.0)kΩ
(22.7)kΩ
(30.3)kΩ
(41.0)kΩ
(57.0)kΩ
(83.7)kΩ
(137.0)kΩ
(297.0)kΩ
160.0kΩ
70.0kΩ
40.0kΩ
25.0kΩ
16.0kΩ
10.0kΩ
5.7kΩ
2.5kΩ
151.0kΩ
60.6kΩ
30.6kΩ
15.6kΩ
6.6kΩ
0.0kΩ
170.0kΩ
80.0kΩ
50.0kΩ
35.0kΩ
26.0kΩ
19.6kΩ
15.7kΩ
12.5kΩ
10.0kΩ
8.0kΩ
6.4kΩ
5.0kΩ
3.9kΩ
2.9kΩ
2.0kΩ
1.3kΩ
0.6kΩ
0.0kΩ
167.0kΩ
77.0kΩ
47.0kΩ
32.0kΩ
23.0kΩ
17.0kΩ
12.7kΩ
9.5kΩ
7.0kΩ
5.0kΩ
2.0kΩ
R1/R3 = (Blue), R2/R4 = Black
# See Note 3
For technical support and more information, see inside back cover or visit www.ti.com
PACKAGE OPTION ADDENDUM
www.ti.com
15-Jan-2013
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package Qty
Drawing
PT6941A
OBSOLETE SIP MODULE
ENF
27
PT6941C
LIFEBUY SIP MODULE
ENG
27
PT6942A
LIFEBUY SIP MODULE
ENF
PT6942C
LIFEBUY SIP MODULE
PT6943A
Eco Plan
Lead/Ball Finish
MSL Peak Temp
Samples
(3)
(Requires Login)
(2)
TBD
Call TI
Call TI
10
Pb-Free
(RoHS)
Call TI
Level-3-215C-168HRS
27
10
Pb-Free
(RoHS)
Call TI
N / A for Pkg Type
ENG
27
10
Pb-Free
(RoHS)
Call TI
Level-3-215C-168HRS
LIFEBUY SIP MODULE
ENF
27
10
Pb-Free
(RoHS)
Call TI
N / A for Pkg Type
PT6943C
LIFEBUY SIP MODULE
ENG
27
10
Pb-Free
(RoHS)
Call TI
Level-3-215C-168HRS
PT6944A
LIFEBUY SIP MODULE
ENF
27
10
Pb-Free
(RoHS)
Call TI
N / A for Pkg Type
PT6944C
LIFEBUY SIP MODULE
ENG
27
10
Pb-Free
(RoHS)
Call TI
Level-3-215C-168HRS
PT6944N
LIFEBUY SIP MODULE
ENE
27
10
Pb-Free
(RoHS)
Call TI
N / A for Pkg Type
PT6947A
LIFEBUY SIP MODULE
ENF
27
10
Pb-Free
(RoHS)
Call TI
N / A for Pkg Type
PT6947C
LIFEBUY SIP MODULE
ENG
27
10
Pb-Free
(RoHS)
Call TI
Level-3-215C-168HRS
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
15-Jan-2013
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
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Addendum-Page 2
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