TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
FEATURES
1
•
•
•
•
•
•
•
•
•
D PACKAGE
(TOP VIEW)
Qualified for Automotive Applications
Complete PWM Power Control
3.6-V to 40-V Operation
Internal Undervoltage-Lockout Circuit
Internal Short-Circuit Protection
Oscillator Frequency: 20 kHz to 500 kHz
Variable Dead Time Provides Control Over
Total Range
±3% Tolerance on Reference Voltage
Available in Q-Temperature Automotive
– High-Reliability Automotive Applications
– Configuration Control / Print Support
– Qualification to Automotive Standards
OUT
VCC
COMP
FB
1
8
2
7
3
6
4
5
GND
RT
DTC
SCP
DESCRIPTION
The TL5001A incorporates on a single monolithic chip all the functions required for a pulse-width-modulation
(PWM) control circuit. Designed primarily for power-supply control, the TL5001A contains an error amplifier, a
regulator, an oscillator, a PWM comparator with a dead-time-control input, undervoltage lockout (UVLO),
short-circuit protection (SCP), and an open-collector output transistor. The TL5001A has a typical reference
voltage tolerance of ±3%.
The error-amplifier common-mode voltage ranges from 0 V to 1.5 V. The noninverting input of the error amplifier
is connected to a 1-V reference. Dead-time control (DTC) can be set to provide 0% to 100% dead time by
connecting an external resistor between DTC and GND. The oscillator frequency is set by terminating RT with an
external resistor to GND. During low VCC conditions, the UVLO circuit turns the output off until VCC recovers to its
normal operating range.
The TL5001A is characterized for operation from –40°C to 125°C.
AVAILABLE OPTIONS (1)
PACKAGED DEVICES (2)
(1)
(2)
(3)
TA
SMALL OUTLINE
(D) (3)
–40°C to 125°C
TL5001AQDRQ1
For the most current package and ordering information, see the
Package Option Addendum at the end of this document, or see the
TI web site at www.ti.com.
Package drawings, thermal data, and symbolization are available at
www.ti.com/packaging.
The D package is available taped and reeled. Add the suffix R to the
device type (e.g., TL5001ADR).
1
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 the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2009, Texas Instruments Incorporated
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com
SCHEMATIC FOR TYPICAL APPLICATION
VI
+
TPS1101
VO
+
2
VCC
5 SCP
VO
COMP
1
3
TL5001A
6
7
DTC
FB
4
RT
GND
8
FUNCTIONAL BLOCK DIAGRAM
VCC
2
DTC
6
RT
7
OUT
1
UVLO
IDT
2.5 V
1V
1.5 V
Error
Amplifier
Reference
Voltage
SCP
Comparator 1
1V
OSC
PWM/DTC
Comparator
+
FB
COMP
4
−
3
SCP
Comparator 2
SCP
5
8
GND
2
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
DETAILED DESCRIPTION
VOLTAGE REFERENCE
A 2.5-V regulator operating from VCC is used to power the internal circuitry of the TL5001A and as a reference for
the error amplifier and SCP circuits. A resistive divider provides a 1-V reference for the error amplifier
noninverting input which typically is within 2% of nominal over the operating temperature range.
ERROR AMPLIFIER
The error amplifier compares a sample of the dc-to-dc converter output voltage to the 1-V reference and
generates an error signal for the PWM comparator. The dc-to-dc converter output voltage is set by selecting the
error-amplifier gain (see Figure 1), using the following expression:
VO = (1 + R1/R2) (1 V)
Compensation
Network
R1
VI(FB)
3
COMP
4
FB
R2
TL5001/A
−
+
8 GND
To PWM
Comparator
Vref = 1 V
Figure 1. Error-Amplifier Gain Setting
The error-amplifier output is brought out as COMP for use in compensating the dc-to-dc converter control loop for
stability. Because the amplifier can only source 45 µA, the total dc-load resistance should be 100 kΩ or more.
OSCILLATOR/PWM
The oscillator frequency (fosc) can be set between 20 kHz and 500 kHz by connecting a resistor between RT and
GND. Acceptable resistor values range from 15 kΩ to 250 kΩ. The oscillator frequency can be determined by
using the graph shown in Figure 5.
The oscillator output is a triangular wave with a minimum value of approximately 0.7 V and a maximum value of
approximately 1.3 V. The PWM comparator compares the error-amplifier output voltage and the DTC input
voltage to the triangular wave and turns the output transistor off whenever the triangular wave is greater than the
lesser of the two inputs.
DEAD-TIME CONTROL (DTC)
DTC provides a means of limiting the output-switch duty cycle to a value less than 100%, which is critical for
boost and flyback converters. A current source generates a reference current (IDT) at DTC that is nominally equal
to the current at the oscillator timing terminal (RT). Connecting a resistor between DTC and GND generates a
dead-time reference voltage (VDT), which the PWM/DTC comparator compares to the oscillator triangle wave as
described in the previous section. Nominally, the maximum duty cycle is 0% when VDT is 0.7 V or less and
100% when VDT is 1.3 V or greater. Because the triangle wave amplitude is a function of frequency and the
source impedance of RT is relatively high (1250 Ω), choosing RDT for a specific maximum duty cycle (D) is
accomplished using the following equation and the voltage limits for the frequency in question as found in
Figure 11 (Voscmax and Voscmin are the maximum and minimum oscillator levels):
R DT + (Rt ) 1250) [D(Vosc max * Vosc min) ) Vosc min]
; V RT + 1 V
VRT
(1)
Where
RDT and Rt are in Ω, D is in decimal
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
3
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com
Soft start can be implemented by paralleling the DTC resistor with a capacitor (CDT) as shown in Figure 2. During
soft start, the voltage at DTC is derived by the following equation:
ǒ
V DT [ I DTR DT 1 * e
*
Ǔ
t
R DTC DT
(2)
6 DTC
CDT
TL5001/A
RDT
Figure 2. Soft-Start Circuit
If the dc-to-dc converter must be in regulation within a specified period of time, the time constant (RDTCDT) should
be t0/3 to t0/5. The TL5001A remains off until VDT ≈ 0.7 V, the minimum ramp value. CDT is discharged every time
UVLO or SCP becomes active.
UNDERVOLTAGE-LOCKOUT (UVLO) PROTECTION
The undervoltage-lockout circuit turns the output transistor off and resets the SCP latch whenever the supply
voltage drops too low (approximately 3 V at 25°C) for proper operation. A hysteresis voltage of 200 mV
eliminates false triggering on noise and chattering.
SHORT-CIRCUIT PROTECTION (SCP)
The TL5001A includes short-circuit protection (see Figure 3), which turns the power switch off to prevent damage
when the converter output is shorted. When activated, the SCP prevents the switch from being turned on until
the internal latching circuit is reset. The circuit is reset by reducing the input voltage until UVLO becomes active
or until the SCP terminal is pulled to ground externally.
When a short circuit occurs, the error-amplifier output at COMP rises to increase the power-switch duty cycle in
an attempt to maintain the output voltage. SCP comparator 1 starts an RC timing circuit when COMP exceeds
1.5 V. If the short is removed and the error-amplifier output drops below 1.5 V before time out, normal converter
operation continues. If the fault is still present at the end of the time-out period, the timer sets the latching circuit
and turns off the TL5001/A output transistor.
2.5 V
RSCP
185 kΩ
SCP
Comparator 2
12 kΩ
CSCP
SCP
5
From Error
Amp
1.5 V
To Output
Drive Logic
Q1
SCP
Comparator 1
Vref = 1 V
Q2
Figure 3. SCP Circuit
4
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
The timer operates by charging an external capacitor (CSCP) connected between the SCP terminal and ground,
towards 2.5 V through a 185-kΩ resistor (RSCP). The circuit begins charging from an initial voltage of
approximately 185 mV and times out when the capacitor voltage reaches 1 V. The output of SCP comparator 2
then goes high, turns on Q2, and latches the timer circuit. The expression for setting the SCP time period is
derived from Equation 3:
VSCP = (2.5 – 0.185) (1 – e–t/τ) + 0.185
(3)
Where
τ = RSCPCSCP
The end of the time-out period (tSCP) occurs when VSCP = 1 V. Solving for CSCP yields Equation 4:
CSCP = 12.46 × tSCP
(4)
Where
t is in seconds, C is in µF
tSCP must be much longer (generally 10 to 15 times) than the converter start-up period, or the converter will not
start.
OUTPUT TRANSISTOR
The output of the TL5001A is an open-collector transistor with a maximum collector current rating of 21 mA and a
voltage rating of 51 V. The output is turned on under the following conditions: the oscillator triangle wave is lower
than both the DTC voltage and the error-amplifier output voltage, the UVLO circuit is inactive, and the
short-circuit protection circuit is inactive.
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
5
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
(1)
VCC
Supply voltage (2)
41 V
VI(FB)
Amplifier input voltage
20 V
VO
Output voltage, OUT
51 V
IO
Output current, OUT
21 mA
IO(peak)
Output peak current, OUT
100 mA
Continuous total power dissipation
See Dissipation Rating
TA
Operating ambient temperature range, TL5001AQDRQ1
–40°C to 125°C
Tstg
Storage temperature range
–65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
(1)
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.
All voltage values are with respect to network ground terminal.
(2)
DISSIPATION RATINGS
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
TA = 125°C
POWER RATING
D
725 mW
5.8 mW/°C
464 mW
377 mW
145 mW
RECOMMENDED OPERATING CONDITIONS
MIN
MAX
3.6
40
UNIT
V
0
1.5
V
VCC
Supply voltage
VI(FB)
Amplifier input voltage
VO
Output voltage, OUT
50
V
IO
Output current, OUT
20
mA
COMP source current
45
µA
COMP dc load resistance
100
kΩ
Rt
Oscillator timing resistor
15
250
kΩ
fOSC
Oscillator frequency
20
500
kHz
TA
Operating ambient temperature
–40
125
°C
6
TL5001AQDRQ1
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range, VCC = 6 V, fosc = 100 kHz (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TL5001AQ
MIN TYP (1)
MAX
0.97
1
1.03
0.94
0.98
1.06
2
12.5
2%
(2)
UNIT
REFERENCE
Output voltage
Input regulation
Output voltage change with temperature
TA = 25°C
TA = MIN to MAX
TA = MIN to MAX,
COMP connected to FB
VCC = 3.6 V to 40 V
TA = MIN to MAX
–6%
(2)
6%
V
mV
UNDERVOLTAGE LOCKOUT
Upper threshold voltage
Lower threshold voltage
Hysteresis
Reset threshold voltage
TA = MIN, 25°C
3
TA = MAX
V
2.55
TA = MIN, 25°C
2.8
TA = MAX
2.0
TA = MIN to MAX
TA = MIN, 25°C
80
200
V
mV
2.1
2.55
TA = MAX
0.35
0.63
TA = MIN, 25°C
0.97
1
1.03
TA = MAX
0.94
0.98
1.06
140
185
230
mV
60
120
mV
V
SHORT-CIRCUIT PROTECTION
SCP threshold voltage
V
SCP voltage, latched
TA = MIN to MAX
No pullup
SCP voltage, UVLO standby
TA = MIN to MAX
No pullup
Equivalent timing resistance
TA = MIN to MAX
185
kΩ
SCP comparator 1 threshold voltage
TA = MIN to MAX
1.5
V
100
kHz
2
kHz
OSCILLATOR
Frequency
TA = MIN to MAX
Standard deviation of frequency
TA = MIN to MAX
Frequency change with voltage
TA = MIN to MAX
Frequency change with temperature
TA = MIN to MAX
Voltage at RT
TA = MIN to MAX
Rt = 100 kΩ
VCC = 3.6 V to 40 V
1
kHz
Q suffix
–9
(2)
(2)
5
9
M suffix
–9 (2)
5
9 (2)
1
kHz
V
DEAD-TIME CONTROL
Output (source) current
TA = MIN to MAX
TA = 25°C
Input threshold voltage
TA = MIN to MAX
(1)
(2)
(3)
V(DT) = 1.5 V
Duty cycle 0%
0.9 ×
IRT (3)
0.5
Duty cycle 100%
Duty cycle 0%
Duty cycle 100%
1.1 ×
IRT (3)
0.7
1.3
0.4
µA
1.5
0.7
1.3
V
1.7
All typical values are at TA = 25°C.
Not production tested.
Output source current at RT
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
7
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range, VCC = 6 V, fosc = 100 kHz (unless otherwise noted)
PARAMETER
TL5001AQ
TEST CONDITIONS
MIN
TYP (1)
MAX
–160
–500
UNIT
ERROR AMPLIFIER
Input bias current
Output voltage swing
TA = MIN to MAX
Positive
Negative
1.5
TA = MIN to MAX
2.3
0.3
nA
V
0.4
V
Open-loop voltage amplification
TA = MIN to MAX
80
dB
Unity gain bandwidth
TA = MIN to MAX
1.5
MHz
Output (sink) current
TA = MIN to MAX
100
600
µA
–45
–70
–30
–45
TA = MIN, 25°C
Output (source) current
TA = MAX
VI(FB) = 1.2 V, COMP = 1 V
VI(FB) = 0 V, COMP = 1 V
µA
OUTPUT
Output saturation voltage
Off-state current
Short-circuit output current
TA = MIN to MAX
IO = 10 mA
TA = MIN to MAX
VO = 50 V, VCC = 0
10
VO = 50 V
10
TA = MIN to MAX
1.5
2
V
µA
VO = 6 V
40
mA
1
1.5
mA
RL = 100 kΩ
1.4
2.1
mA
TOTAL DEVICE
Standby supply current
Off state
Average supply current
(1)
8
TA = MIN to MAX
TA = MIN to MAX
All typical values are at TA = 25°C.
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
PARAMETER MEASUREMENT INFORMATION
2.3 V
COMP
1.5 V
DTC
OSC
PWM/DTC
Comparator
OUT
SCP
Comparator 1
1V
SCP
SCP Timing Period
SCP
Comparator 2
VCC
A.
0V
3V
The waveforms show timing characteristics for an intermittent short circuit and a longer short circuit that is sufficient to
activate SCP.
Figure 4. PWM Timing Diagram
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
9
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com
TYPICAL CHARACTERISTICS
OSCILLATOR FREQUENCY
vs
TIMING RESISTANCE
fosc − Oscillation Frequency − kHz
100 k
10 k
10 k
2
100 k
96
94
92
90
− 25
25
50
75
100
TA − Ambient Temperature − °C
Figure 6.
REFERENCE OUTPUT VOLTAGE
vs
POWER-SUPPLY VOLTAGE
REFERENCE OUTPUT VOLTAGE FLUCTUATION
vs
AMBIENT TEMPERATURE
0.6
1.2
1
0.8
0.6
0.4
0.2
0
2
3
4
5
6
7
8
9
10
0.4
0.2
0
− 0.2
− 0.4
− 0.6
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
VCC = 6 V
FB and COMP
Connected Together
− 0.8
− 50
VCC − Power-Supply Voltage − V
Figure 7.
10
0
Figure 5.
1.4
1
98
Rt − Timing Resistance − Ω
1.6
0
VCC = 6 V
Rt = 100 kΩ
DT Resistance = 100 kΩ
88
− 50
1M
TA = 25°C
FB and COMP
Connected Together
1.8
V ref − Reference Output Voltage − V
100
VCC = 6 V
DT Resistance = Rt
TA = 25°C
∆V ref − Reference Output Voltage Fluctuation − %
fosc − Oscillator Frequency − Hz
1M
OSCILLATION FREQUENCY
vs
AMBIENT TEMPERATURE
− 25
0
25
50
75
TA − Ambient Temperature − °C
100
Figure 8.
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
TYPICAL CHARACTERISTICS (continued)
AVERAGE SUPPLY CURRENT
vs
POWER-SUPPLY VOLTAGE
AVERAGE SUPPLY CURRENT
vs
AMBIENT TEMPERATURE
1.3
2
I CC − Average Supply Current − mA
I CC − Average Supply Current − mA
Rt = 100 kΩ
TA = 25 °C
1.5
1
0.5
10
20
30
40
1.1
1
0.9
0.8
− 25
0
25
50
75
VCC − Power-Supply Voltage − V
TA − Ambient Temperature − °C
Figure 9.
Figure 10.
PWM TRIANGLE WAVE AMPLITUDE VOLTAGE
vs
OSCILLATOR FREQUENCY
ERROR AMPLIFIER OUTPUT VOLTAGE
vs
OUTPUT (SINK) CURRENT
100
3
1.8
VCC = 6 V
VI(FB) = 1.2 V
TA = 25 °C
VCC = 6 V
TA = 25 °C
VO − Error Amplifier Output Voltage − V
PWM Triangle Wave Amplitude Voltage − V
1.2
0
− 50
0
0
VCC = 6 V
Rt = 100 kΩ
DT Resistance = 100 kΩ
1.5
1.2
Voscmax (100% duty cycle)
0.9
Voscmin (zero duty cycle)
0.6
0.3
0
10 k
100 k
1M
fosc − Oscillator Frequency − Hz
10 M
2.5
2
1.5
1
0.5
0
0
Figure 11.
0.2
0.4
0.6
IO − Output (Sink) Current − mA
Figure 12.
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
11
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com
TYPICAL CHARACTERISTICS (continued)
ERROR AMPLIFIER OUTPUT VOLTAGE
vs
OUTPUT (SOURCE) CURRENT
ERROR AMPLIFIER OUTPUT VOLTAGE
vs
AMBIENT TEMPERATURE
2.46
VCC = 6 V
VI(FB) = 0.8 V
TA = 25 °C
2
1.5
1
0.5
0
0
20
40
60
80
100
IO − Output (Source) Current − µA
2.43
2.42
2.41
− 25
25
50
75
Figure 13.
Figure 14.
ERROR AMPLIFIER OUTPUT VOLTAGE
vs
AMBIENT TEMPERATURE
ERROR AMPLIFIER OPEN-LOOP GAIN
AND PHASE SHIFT
vs
FREQUENCY
100
40
VCC = 6 V
VI(FB) = 1.2 V
No Load
200
180
160
140
120
− 50
− 25
0
25
50
75
TA − Ambient Temperature − °C
100
VCC = 6 V
TA = 25 °C
−180°
30
−210°
20
−240°
AV
−270°
10
0
φ
− 20
10 k
−300°
−330°
− 10
Figure 15.
12
0
TA − Ambient Temperature − °C
AV − Error Amplifier Open-Loop Gain − dB
VO − Error Amplifier Output Voltage − mV
2.44
2.40
− 50
120
240
220
2.45
VCC = 6 V
VI(FB) = 0.8 V
No Load
100 k
1M
Error Amplifier Open-Loop Phase Shift
2.5
VO − Error Amplifier Output Voltage − V
VO − Error Amplifier Output Voltage − V
3
−360°
10 M
f − Frequency − Hz
Figure 16.
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
TL5001A-Q1
www.ti.com .............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
TYPICAL CHARACTERISTICS (continued)
OUTPUT DUTY CYCLE
vs
DTC VOLTAGE
SCP TIME-OUT PERIOD
vs
SCP CAPACITANCE
120
12
Output Duty Cycle − %
100
t SCP − SCP Time-Out Period − ms
VCC = 6 V
Rt = 100 kΩ
TA = 25 °C
80
60
40
20
0
VCC = 6 V
Rt = 100 kΩ
DT Resistance = 200 kΩ
TA = 25 °C
10
8
6
4
2
0
0
0.5
1
DTC Voltage − V
1.5
2
0
40
60
80
100
120
CSCP − SCP Capacitance − nF
Figure 17.
Figure 18.
DTC OUTPUT CURRENT
vs
RT OUTPUT CURRENT
OUTPUT SATURATION VOLTAGE
vs
OUTPUT (SINK) CURRENT
2
− 60
DT Voltage = 1.3 V
TA = 25 °C
VCC = 6 V
TA = 25 °C
− 50
VCE − Output Saturation Voltage − V
IO(DT) − DTC Output Current − µ A
20
− 40
− 30
− 20
− 10
0
1.5
1
0.5
0
0
− 10
− 20
− 30
− 40
− 50
− 60
0
IO − RT Output Current − µA
Figure 19.
5
10
15
IO − Output (Sink) Current − mA
Figure 20.
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
20
13
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com
APPLICATION INFORMATION
VI
5V
C1
100 µF
10 V
R1
470 Ω
+
Q1
TPS1101
GND
L1
20 µH
3.3 V
C3
0.1 µF
CR1
MBRS140T3
C2
100 µF
10 V
2
C4
1 µF
+
VCC
5
SCP
VO
C5
0.1 µF
R2
56 kΩ
R3
43 kΩ
COMP
1
7
GND
3
U1
TL5001A
6
+
R5
7.50 kΩ
1%
C6
0.012 µF
DTC
C7
0.0047 µF
R4
5.1 kΩ
FB
R7
2.0 kΩ
4
RT
R6
3.24 kΩ
1%
GND
8
Partial Bill of Materials:
U1
TL5001A
Q1
TPS1101
LI
CTX20-1 or
23 turns of #28 wire on
Micrometals No. T50-26B core
C1
TPSD107M010R0100
C2
TPSD107M010R0100
CR1
MBRS140T3
Texas Instruments
Texas Instruments
Coiltronics
AVX
AVX
Motorola
A.
Frequency = 200 kHz
B.
Duty cycle = 90% max
C.
Soft-start time constant (TC) = 5.6 ms
D.
SCP TC = 70 ms
Figure 21. Step Down Converter
14
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
TL5001AQDRG4Q1
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
501AQ1
TL5001AQDRQ1
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
501AQ1
(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)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
工商网监
湘ICP备2023018690号
