Page 1
TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
D
1-W Output (VCC ≥ 4.5 V)
D
2.7-V to 9-V Input Operating Range
D
78% Typical Efficiency
D
160-kHz Fixed-Frequency Current-Mode
PWM Controller
D
EN Input Inhibits Operation and Reduces
D OR P PACKAGE
(TOP VIEW)
EN
REF
SS
COMP
1
2
3
4
V
8
CC
OUT
7
GND
6
5
FB
Supply Current to 1 µA
D
Output Voltage Limited to VO ≤ 12 V– V
D
Soft Start
D
8-Pin SOIC and DIP Packages
D
–40°C to 85°C Free-Air Temperature Range
D
Pin-for-Pin Compatible with MAX755
CC
description
The TPS6755 is an adjustable inverting dc/dc converter capable of operating from inputs as low as 2.7 V . The
only external components required are an inductor, an output filter capacitor , an input filter capacitor, a reference
filter capacitor, two resistors, and a Schottky rectifier . An enable input is provided to shut down the inverter when
an output voltage is not needed. The typical supply current is 1.9 mA at no-load and is further reduced to 1-µA
when the enable input is low.
The device features a 160-kHz current-mode pulse-width-modulation (PWM) controller with a p-channel
MOSFET power switch. The gate drive uses the converter output to reduce the die area needed to realize the
0.4-Ω MOSFET. Soft start is accomplished with the addition of one small capacitor at SS. A 1.22-V reference
is available for external loads up to 125 µA.
The TPS6755 is attractive for board-level dc/dc conversion in computer peripherals and in battery-powered
equipment requiring high efficiency and low supply current.
Available in an 8-pin DIP or an 8-pin SOIC package, the TPS6755 operates over a free-air temperature range
of –40°C to 85°C.
V
2.7 V to 9 V
ENABLE
†
Not required for loads of 100 mA or less
I
10 µF
10.2 kΩ
+
82 pF
+
47 µF
†
1
2
3
4
TPS6755
EN
REF
SS
COMP
42.2 kΩ
V
CC
OUT
GND
FB
8
1N5817
7
6
5
1 µF
10 µH
+
– 5 V
100 µF
Figure 1. Typical Circuit
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1996, Texas Instruments Incorporated
1
Page 2
TPS6755
CHIP FORM
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
AVAILABLE OPTIONS
PACKAGED DEVICES
–40°C to 85°C TPS6755ID TPS6755IP TPS6755Y
The D package is also available taped and reeled (TPS6755IDR).
functional block diagram
T
A
SMALL OUTLINE
(D)
PLASTIC DIP
(P)
(Y)
EN
FB
COMP
GND
REF
SS
1
5
4
6
2
3
+
_
Error
Amplifier
Voltage
Reference
1.2 MΩ
x3
SS Clamp
EN
EN
Current-
Sense Amplifier
x3
Drive Latch
R
PWM
Comparator
S
Q
160-kHz
Oscillator
8
V
CC
Overcurrent
Comparator
Σ
Driver
7
FB
Power Switch PMOS
OUT
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page 3
DESCRIPTION
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
chip information
These chips, when properly assembled, display characteristics similar to the TPS6755. Thermal compression
or ultrasonic bonding may be used on the doped aluminum bonding pads. The chips may be mounted with
conductive epoxy or a gold-silicon preform.
BONDING PAD ASSIGNMENTS
8881
TPS6755
(1)
EN
REF
COMP
(2)
(3)
SS
(4)
CHIP THICKNESS: 15 TYPICAL
BONDING PADS: 4 × 4 MINIMUM
TJ max = 150°C
TOLERANCES ARE ±10%.
ALL DIMENSIONS ARE IN MILS.
82
2
7
7
6
3
455
75
Terminal Functions
TERMINAL
NAME NO.
EN 1 Enable. EN > 2 V turns on the TPS6755. EN ≤ 0.4 V turns it off.
REF 2 1.22-V reference voltage output. REF can source 125 µA for external loads.
SS 3 Soft start. A capacitor between SS and GND brings the output voltage up slowly.
COMP 4 Compensation. A capacitor to ground stabilizes the feedback loop.
FB 5 Feedback. FB connects to the dc/dc converter output.
GND 6 Ground
OUT 7 Power MOSFET drain connection
V
CC
8 Supply-voltage input
TPS6755Y
(8)
(7)
(6)
(5)
V
CC
OUT
GND
FB
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
Page 4
TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
detailed description
The following descriptions refer to the functional block diagram.
current-sense amplifier
The current-sense amplifier, which has a fixed gain of 3, amplifies the slope-compensated current-sense
voltage (a summation of the voltage on the current-sense resistor and the oscillator ramp) and feeds it to the
PWM comparator.
driver latch
The latch, which consists of a set/reset flip-flop and associated logic, controls the state of the power switch by
turning the driver on and off. A high output from the latch turns the switch on; a low output turns it off. In normal
operation the flip-flop is set high during the clock pulse, but gating keeps the latch output low until the clock pulse
is over. The latch is reset when the PWM comparator output goes high.
enable (EN)
A logic low on EN puts the TPS6755 in shutdown mode. In shutdown, the output power switch, voltage
reference, and other functions shut off and the supply current is reduced to 10 µA maximum. The soft-start
capacitor is discharged through a 1.2-MΩ resistance and the output falls to zero volts.
error amplifier
The error amplifier is a high-gain differential amplifier used to regulate the converter output voltage. The
amplifier generates an error signal, which is fed to the PWM comparator, by comparing a sample of the output
voltage to the reference and amplifying the difference. The output sample is obtained from a resistive divider
connected between FB and REF. FB is connected externally to the converter output, and the divider output is
connected to the error-amplifier input. An 82-pF capacitor connected between COMP and GND is required to
stabilize the control loop for loads greater than 100 mA.
oscillator and ramp generator
The oscillator circuit provides a 160-kHz clock to set the converter operating frequency , and a timing ramp for
slope compensation. The clock waveform is a pulse, a few hundred nanoseconds in duration, that is used to
limit the maximum power switch duty cycle to 95%. The timing ramp is summed with the current-sense signal
at the input to the current-sense amplifier.
overcurrent comparator
The overcurrent comparator monitors the current in the power switch. The comparator trips and initiates a
soft-start cycle if the power-switch current exceeds 2 A peak.
power switch
The power switch is a 0.4-Ω p-channel MOSFET with current sensing. The drain is connected to OUT and the
source is connected to a current-sense resistor. The voltage across the resistor is proportional to current in the
power switch and is tied to the overcurrent comparator and the current-sense amplifier. In normal operation,
the power switch is turned on at the start of each clock cycle and turned off when the PWM comparator resets
the drive latch.
PWM comparator
The comparator resets the drive latch and turns off the power switch whenever the slope-compensated
current-sense signal from the current-sense amplifier exceeds the error signal.
reference
The 1.22-V reference is brought out on REF and can source 125-µA maximum to external loads. A 10-µF
capacitor connected between REF and GND is recommended to minimize noise pickup.
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page 5
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
SS clamp
The SS clamp circuit limits the signal level on error-amplifier output during start-up. The voltage on SS is
amplified and used to override the error-amplifier output until the error-amplifier voltage rises above that output,
at which point the error amplifier takes over. This prevents the input to the PWM comparator from exceeding
its common-mode range (i.e., error amplifier output too high to be reached by the current ramp) by limiting the
maximum voltage on the error-amplifier output during start-up.
Soft start causes the output voltage to increase to the regulation point at the controlled rate. The voltage on the
charging soft-start capacitor gradually raises the clamp on the error amplifier output voltage, limiting surge
currents at power up by increasing the current limit threshold on a cycle-by-cycle basis. A soft-start cycle is
initiated when either the enable (EN) signal is switched high or an overcurrent fault condition triggers the
discharge of the soft-start capacitor.
DISSIPATION RATING TABLE
PACKAGE
D 725 mW 5.8 mW/°C 464 mW 377 mW
P 1175 mW 9.4 mW/°C 752 mW 611 mW
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
TPS6755
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Pin voltages: V
Peak switch current 2 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference current 2.5 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperture range, T
Storage temperature range, T
Lead temperature 1,6mm (1/16 inch) from case for 10 s 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to network terminal ground.
(see Note 1) –0.3 V to 9 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
OUT to VCC 12.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FB (see Note 1) 25 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SS, COMP, EN voltage range (see Note 1) –0.3 V to V
–40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
CC
+0.3 V. . . . . . . . . . . . . . . . . . . . . . . .
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage 2.7 9 V
Decoupling capacitor 1 µF
Input capacitor 47 µF
Reference capacitor 10 µF
Output capacitor 100 µF
Compensation capacitor 82 pF
Inductor 10 µH
†
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
5
Page 6
TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
electrical characteristics over recommended operating free-air temperature range, V
= 0, EN = 5 V, typical values are at T
I
O
PARAMETER TEST CONDITION MIN TYP MAX UNIT
Supply current 1.9 mA
Standby current EN = 0.4 V 1 10 µA
High-level input threshold voltage, EN 2 V
Low-level input threshold voltage, EN 0.4 V
Input current, EN –1 1 µA
Impedance, COMP 7.5 kΩ
Oscillator frequency 160 kHz
Reference voltage I
Reference drift 50 ppm/°C
On resistance, OUT 0.4 Ω
Leakage current, OUT 20 nA
Startup voltage 2.7 V
25°C (unless otherwise noted) (refer to Figure 15)
A =
≤ 125 µA 1.22 V
O(ref)
CC
= 5 V,
performance characteristics over recommended operating free-air temperature range, typical
values at T
Output voltage
Load current
Line regulation VCC = 4 V 0.4%
Load regulation IO = 25 mA to 200 mA 0.4%
Efficiency IO =100 mA 78%
= 25°C (unless otherwise noted) (refer to Figure 15)
A
PARAMETER TEST CONDITION MIN TYP MAX UNIT
VCC = 4 V to 7 V
IO = 0 mA to 200 mA
VCC = 2.7 V 125
VCC = 4 V 175
VCC = 4.5 V 200 270
–4.75 –5 –5.25 V
mA
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page 7
typical system waveforms
5
0
– 5
Voltage at OUT – V
VI = 5 V
VO = – 5 V
IO = 100 mA
TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
APPLICATION INFORMATION
1
0.5
– Output Voltage – mV
O
V
0
I – Inductor Current – A
2.5 µs/div
t – Time – s
Figure 2. Switching Waveforms
VI = 5 V
VO = – 5 V
IO = 100 mA
0
– 50
1
0.5
t – Time – s
Figure 3. Output Voltage Ripple
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2.5 µs/div
0
I – Inductor Current – A
7
Page 8
TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
APPLICATION INFORMATION
VI = 5 V
VO = – 5 V
IO = 0 mA to 200 mA
0.2
0.1
– Load Current – AI
L
0
5 ms/div
50
0
–50
Output Voltage Ripple – mV
8
6
4
2
– Input Voltage – V
I
V
0
VI = 4 V to 7 V
VO = – 5 V
IO = 100 mA
t – Time – s
Figure 4. Load Transient Response
500 µs/div
20
0
– 20
Output Voltage Ripple – mV
t – Time – s
Figure 5. Line Transient Response
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page 9
TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
APPLICATION INFORMATION
VI = 5 V
VO = –5 V
IO = 100 mA
6
4
2
Voltage at EN – V
0
system typical characteristics
EFFICIENCY
vs
LOAD CURRENT
80
79
78
77
76
75
t – Time – s
Figure 6. Enable Response Time
TA = 25°C
(see Figure 15)
VI =7 V
VI = 5 V
1.6
1.4
1.2
0.8
1
0
– 2
– 4
– 6
2.5 ms/div
PEAK INDUCTOR CURRENT
vs
LOAD CURRENT
– Output Voltage – V
O
V
74
Efficiency – %
73
72
71
70
25 50 75 100 125 150 175
IL – Load Current – mA
VI =2.7 V
Figure 7
200 225 250 300
275
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
0.6
Peak Inductor Current – A
0.4
0.2
0
0 50 100 150
200 250 300
IL – Load Current – mA
Figure 8
9
Page 10
TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
APPLICATION INFORMATION
NO-LOAD SUPPLY CURRENT
SUPPLY VOLTAGE
2
1.8
1.6
1.4
1.2
1
0.8
0.6
No-Load Supply Current – mA
0.4
0.2
0
012 34
Supply Voltage – V
Figure 9
vs
IO = 0 A
(see Figure 15)
567
MAXIMUM LOAD CURRENT
SUPPLY VOLTAGE
400
(see Figure 15)
350
300
250
Maximum Load Current – mA
200
150
2 2.5 3 3.5 4 4.5 5
Supply Voltage – V
Figure 10
vs
5.5 6 6.5 7
OSCILLATOR FREQUENCY
TEMPERATURE
175
170
165
160
155
150
– Oscillator Frequency – kHz
osc
f
145
140
–40 –20 0 20 40 60
T – Temperature – °C
Figure 11
vs
VCC = 7 V
VI = 2.7 V
VI = 5 V
80 100 120 140
1.8
1.6
1.4
1.2
1
0.8
0.6
Switch Current Limit – A
0.4
0.2
0
0 200 400 600
SWITCH CURRENT LIMIT
vs
SOFT-START VOLTAGE
VI =7 V
VI = 5 V
VI = 2.7 V
R1 and R2 Varied
(see Figure 15)
800 1000 1200
Soft-Start Voltage – mV
Figure 12
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page 11
TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
APPLICATION INFORMATION
SOFT-START DELAY
90
C6 varied
80
(see Figure 7)
70
60
50
40
30
Soft-Start Delay – ms
20
10
0
0 0.2 0.4 0.6 0.8 1
vs
CAPACITANCE
VI = 2.7 V
VI = 5 V
C – Capacitance – µF
Figure 13
VI = 7 V
1.2 1.4 1.6
Ω
– Drain-Source On-State Resistance –
DS(on)
r
DRAIN-SOURCE ON-STATE RESISTANCE
vs
TEMPERATURE
0.7
0.6
VI = 2.7 V
0.5
0.4
0.3
0.2
0.1
0
–40 –20 0 20 40 60
T – Temperature – °C
VI = 5 V
80 100 120 140
Figure 14
VI = 7 V
The TPS6755 operates in the voltage-inverting circuit, shown in Figure 15, which can generate an output. The
circuit is ideal for applications that require a negative polarity voltage on the output with respect to the input
ground, and for energy management systems. The TPS6755 can be placed in a shutdown mode (1-µA
quiescent current) by forcing EN low.
soft start
The soft-start capacitor provides an orderly start-up of the converter by slowly increasing the switch current limit
during power-up. The soft-start timing is controlled by the SS capacitance (see Figure 13 for the capacitance
value corresponding to the desired delay time). The switch current limit is proportional to the voltage applied
to SS, which is internally pulled to REF by a 1.2-MΩ resistor. SS can be externally pulled lower than REF to limit
the switch current. A UVLO condition or an overcurrent condition initiates an SS cycle by discharging the SS
capacitor to ground through an internal transistor. A minimum of a 10-nF capacitor must be connected to SS
to current limit correctly.
inductor selection
The standard 10-µH inductor required by the TPS6755 must have a saturation current greater than the peak
switch current at the desired maximum load. Operation over the full voltage range and current range is assured
by the 10-µH inductor. To determine the required inductor staturation level, refer to the typical operating
characteristics graph for peak inductor current versus load current (see Figure 8).
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
11
Page 12
TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
APPLICATION INFORMATION
output filter capacitor
A low equivalent series resistance (ESR) output filter capacitor is necessary to minimize the output-ripple
voltage. An ESR of 100 mΩ limits the output ripple to 90 mV or less for output loads up to 200 mA.
rectifier
A Schottky diode or high-speed silicon rectifier should be used with a maximum continuous current rating of
1 A for operation up to full load.
output ripple filtering
A low-pass filter may be added to the converter output to reduce the output voltage ripple (see Figure 15). The
LC filter has a cutoff frequency of 7.2 kHz. The inductor filter must have a low resistance to avoid large output
voltage drops. The output voltage ripple is reduced to 5 mV when the LC output filter is used. FB must be
connected to the output node before the connection for the low-pass filter.
adjustable output voltage
The output voltage of the TPS6755 is limited to VO ≤ 12 V – VCC and is set by two external resistors, R4 and
R5 (see Figure 15). R5 can be set to any value between 10 kΩ to 20 kΩ, and R4 is calculated using the following
formula: R4 = VO R5/1.22 V. These resistors form a voltage divider between FB, COMP, and REF. The
converter adjusts the output such that COMP level is at GND.
printed circuit board layout
A ground plane is recommended in a printed circuit board (PCB) layout to ensure quiet operation. Attention
should be given to minimizing the lengths of the switching loops. Bypass capacitors should be placed as close
to the TPS6755 as possible to prevent instability and noise pickup. V
with a 1-µF ceramic capacitor and a large bypass capacitor (e.g. 47 µF) to maximize noise immunity. The
TPS6755 should not be used with IC sockets, wire-wrap prototype boards, or other constructions that are
susceptible to noise pick-up.
and GND should be bypassed directly
CC
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page 13
0.1 µF
C6
V
I
ENABLE
300 kΩ
R2
R3
10 kΩ
R1
130 kΩ
C3
10 µF
C1
47 µF
+
ADJUSTABLE INVERTING DC/DC CONVERTER
APPLICATION INFORMATION
+
TPS6755ID
R5
C4
82 pF
1
2
3
4
EN
REF
SS
COMP
R4
V
CC
OUT
GND
FB
8
7
6
5
TPS6755
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
Optional
Low-Pass Output Filter
C5
1 µF
10 µH
L1
22 µH
D1
1N5817
1 A, 20 V
R4 (kΩ)
42.2
16.7
75.2
+
R5 (kΩ)
10.2
10.2
10.2
22 µF
C2
+
100 µF/10 V
VO (V)
–5
–2
–9
V
O
Figure 15. Application Circuit
Table 1. Bill of Materials
QTY DESCRIPTION
1 IC Power supply U1 TPS6755ID Texas Instruments
1 Diode Schottky D1 1N5817GI General Instrument
1 Inductor 10 µH L1
1 Capacitor 47 µF tantalum 16 V 7343 C1
1 Capacitor 100 µF tantalum 10 V 7343 C2
1 Capacitor 10 µF tantalum 10 V 3528 C3
1 Capacitor 82 pF ceramic 50 V 0805 C4
1 Capacitor 1 µF ceramic 16 V 1206 C5
1 Capacitor 0.1 µF ceramic 50 V 0805 C6
1 Resistor 130 kΩ 0805 R1
1 Resistor 300 kΩ 0805 R2
1 Resistor 10 kΩ 0805 R3
1 Resistor 42.2 kΩ 1% 0805 R4
1 Resistor 10.2 kΩ 1% 0805 R5
REF
DES
MANUFACTURER
PART NO.
DO1608C-103
CD54-100
593D476X9016D2W
TPSD476K016R0100
593D107X9010D2W
TPSD107D016R0100
293D106X0010B2W
267E 1002 106
MANUFACTURER
Coilcraft, Sumida
Sprague, AVX
Sprague, AVX
Sprague, MATSUO
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
13
Page 14
TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
MECHANICAL DATA
D (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE
14 PIN SHOWN
14
1
0.069 (1,75) MAX
0.050 (1,27)
A
0.020 (0,51)
0.014 (0,35)
0.010 (0,25)
0.004 (0,10)
8
7
0.010 (0,25)
0.157 (4,00)
0.150 (3,81)
M
0.244 (6,20)
0.228 (5,80)
Seating Plane
0.004 (0,10)
PINS **
DIM
A MAX
A MIN
0.008 (0,20) NOM
Gage Plane
0°–8°
8
0.197
(5,00)
0.189
(4,80)
14
0.344
(8,75)
0.337
(8,55)
0.010 (0,25)
0.044 (1,12)
0.016 (0,40)
4040047/B 03/95
16
0.394
(10,00)
0.386
(9,80)
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).
D. Four center pins are connected to die mount pad.
E. Falls within JEDEC MS-012
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page 15
TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
MECHANICAL DATA
P (R-PDIP-T8) PLASTIC DUAL-IN-LINE PACKAGE
0.400 (10,60)
0.355 (9,02)
58
0.260 (6,60)
0.240 (6,10)
41
0.070 (1,78) MAX
0.020 (0,51) MIN
0.200 (5,08) MAX
0.125 (3,18) MIN
0.100 (2,54)
0.021 (0,53)
0.015 (0,38)
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001
0.010 (0,25)
M
0.310 (7,87)
0.290 (7,37)
Seating Plane
0°–15°
0.010 (0,25) NOM
4040082/B 03/95
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
15
Page 16
PACKAGE OPTION ADDENDUM
www.ti.com
8-Aug-2005
PACKAGING INFORMATION
Orderable Device Status
(1)
Package
Type
Package
Drawing
Pins Package
Qty
Eco Plan
TPS6755ID ACTIVE SOIC D 8 75 Green (RoHS &
no Sb/Br)
TPS6755IDG4 ACTIVE SOIC D 8 75 Green (RoHS &
no Sb/Br)
TPS6755IDR ACTIVE SOIC D 8 2500 Green (RoHS &
no Sb/Br)
TPS6755IDRG4 ACTIVE SOIC D 8 2500 Green (RoHS &
no Sb/Br)
TPS6755IP ACTIVE PDIP P 8 50 Pb-Free
TPS6755IPE4 ACTIVE PDIP P 8 50 Pb-Free
(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.
(RoHS)
(RoHS)
(2)
Lead/Ball Finish MSL Peak Temp
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-NC-NC-NC
CU NIPDAU Level-NC-NC-NC
(3)
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) 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.
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.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 1
Page 17
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms
and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty . Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process
in which TI products or services are used. Information published by TI regarding third-party products or services
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Following are URLs where you can obtain information on other Texas Instruments products and application
solutions:
Products Applications
Amplifiers amplifier.ti.com Audio www.ti.com/audio
Data Converters dataconverter.ti.com Automotive www.ti.com/automotive
DSP dsp.ti.com Broadband www.ti.com/broadband
Interface interface.ti.com Digital Control www.ti.com/digitalcontrol
Logic logic.ti.com Military www.ti.com/military
Power Mgmt power.ti.com Optical Networking www.ti.com/opticalnetwork
Microcontrollers microcontroller.ti.com Security www.ti.com/security
Telephony www.ti.com/telephony
Video & Imaging www.ti.com/video
Wireless www.ti.com/wireless
Mailing Address: Texas Instruments
Post Office Box 655303 Dallas, Texas 75265
Copyright 2005, Texas Instruments Incorporated
Loading...