Order
Now
Product
Folder
Support &
Community
Tools &
Software
Technical
Documents
TPS62840
SLVSEC6D – JUNE 2019 – REVISED MARCH 2020
TPS62840 1.8-V to 6.5-V, 750-mA, 60-nA IQ Step-Down Converter
1 Features
3 Description
•
•
•
•
•
•
•
•
•
•
•
•
The TPS62840 is a high-efficiency step-down
converter with ultra-low operating quiescent current of
typically 60 nA. The device contains special circuitry
to achieve just 120 nA IQ in 100% mode to further
extend battery life near the end of discharge.
1
60-nA operating quiescent current
100% duty-cycle mode with 120-nA IQ
Input voltage range VIN from 1.8 V to 6.5 V
Output current up to 750 mA
RF friendly DCS-Control™
80% efficiency at 1 µA IOUT (3.6 VIN to 1.8 VOUT)
16 selectable output voltages via VSET pin
Auto transition PFM/PWM or forced-PWM mode
Selectable forced PWM and STOP modes
Output discharge function
25-nA shutdown current
SON-8, WCSP-6 and thermally enhanced
HVSSOP-8 packages
2 Applications
•
•
•
•
•
•
•
The device uses DCS-Control to cleanly power radios
and operates with a typical switching frequency of 1.8
MHz. In Power-Save Mode, the device extends the
light load efficiency down to a load current range of 1
μA and below.
16 predefined output voltages can be selected by
connecting a resistor to pin VSET, making the device
flexible for various applications with a minimum
amount of external components.
The STOP pin of the device immediately eliminates
any switching noise in order to take a noise-free
measurement in test and measurement systems.
The TPS62840 provides an output current of up to
750 mA. With an input voltage of 1.8 V to 6.5 V, the
device supports multiple power sources such as 2S
to 4S Alkaline, 1S to 2S Li-MnO2, or 1S Li-Ion/LiSOCl2.
Smart meters, smart thermostats
Asset tracking devices
Wearable electronics
Medical sensor patches and patient monitors
Industrial IoT (smart sensors) / NB-IoT
Test and measurement
ATEX / intrinsic safety
Device Information(1)
PART NUMBER
TPS6284x
PACKAGE
BODY SIZE (NOM)
8 pin DLC (SON)
1.5 mm x 2 mm
6 pin YBG (WCSP)
0.97 mm x 1.47 mm
8 pin DGR
(HVSSOP)
3 mm x 5 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application
TPS62841DLC
VIN
CI
4.7 µF
RUN /STOP
VOUT
VOS
MODE
STOP
EN
90
CO
10µF
VSET
ENABLE
95
SW
GND
MODE
100
L
2.2 µH
85
Efficiency (%)
VIN
Efficiency versus Load Current (VOUT = 1.8 V)
RSET
80
75
70
65
VIN
VIN
VIN
VIN
VIN
VIN
VIN
60
55
50
45
40
100n
1P
10P
100P
1m
10m
Output Current (A)
=
=
=
=
=
=
=
100m
1.8V
2.5V
3.0V
3.6V
4.2V
5.0V
6.5V
1
D002
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TPS62840
SLVSEC6D – JUNE 2019 – REVISED MARCH 2020
www.ti.com
Table of Contents
1
2
3
4
5
6
7
8
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Device Comparison Table.....................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
2
3
4
6
7.1
7.2
7.3
7.4
7.5
7.6
6
6
6
6
7
9
Absolute Maximum Ratings ......................................
ESD Ratings..............................................................
Recommended Operating Conditions.......................
Thermal Information ..................................................
Electrical Characteristics...........................................
Typical Characteristics ..............................................
Detailed Description ............................................ 11
8.1 Overview ................................................................. 11
8.2 Functional Block Diagram ....................................... 11
8.3 Feature Description................................................. 12
8.4 Device Functional Modes........................................ 15
9
Application and Implementation ........................ 16
9.1 Application Information............................................ 16
9.2 Typical Application ................................................. 16
9.3 System Example ..................................................... 27
10 Power Supply Recommendations ..................... 28
11 Layout................................................................... 28
11.1 Layout Guidelines ................................................. 28
11.2 Layout Example .................................................... 28
12 Device and Documentation Support ................. 30
12.1
12.2
12.3
12.4
12.5
Device Support......................................................
Support Resources ...............................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
30
30
30
30
30
13 Mechanical, Packaging, and Orderable
Information ........................................................... 30
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision C (November 2019) to Revision D
Page
•
Updated the Device Comparison Table ................................................................................................................................ 3
•
Added efficiency graphs to the Application Curves .............................................................................................................. 20
Changes from Revision B (August 2019) to Revision C
Page
•
Added SON-8, WCSP-6, and thermally enhanced HVSSOP-8 to Features .......................................................................... 1
•
Added ATEX / Intrinsic safety to Applications ....................................................................................................................... 1
•
Updated Typical Application image to show TPS62842DGR device ..................................................................................... 1
•
Added orderable part number TPS62841DGR to Device Comparison Table ....................................................................... 3
•
Added orderable part number TPS62842DGR to Device Comparison Table ....................................................................... 3
•
Updated Thermal Information values to support TPS62842DGR .......................................................................................... 6
•
Added low-side MOSFET switch current limit to Electrical Characteristics ........................................................................... 8
•
Added TPS62841DGR to Output Voltage Selection ........................................................................................................... 13
•
Updated Efficiency Power Save graphs in Application Curves ............................................................................................ 20
•
Updated Load Transient waveform in Application Curves ................................................................................................... 24
•
Added PCB layout for DGR package ................................................................................................................................... 29
Changes from Revision A (July 2019) to Revision B
•
2
Page
Changed Advance Information marketing status to Production Data ................................................................................... 1
Submit Documentation Feedback
Copyright © 2019–2020, Texas Instruments Incorporated
Product Folder Links: TPS62840
TPS62840
www.ti.com
SLVSEC6D – JUNE 2019 – REVISED MARCH 2020
5 Device Comparison Table
ORDERABLE
PART NUMBER
TPS62840DLC
TPS62840YBG
OUTPUT VOLTAGE
1.8 V to 3.3 V
in 100-mV steps
OUTPUT
CURRENT
750 mA
OUTPUT
DISCHARGE
MODE PIN
STOP PIN
PACKAGE
PACKAGE
MARKING
yes
yes
SON-8
(DLC)
E5
no
no
WCSP-6
(YBG)
62840
yes
yes
SON-8
(DLC)
E9
no
no
WCSP-6
(YBG)
62841
yes
no
HVSSOP-8
(DGR)
62841
no
HVSSOP-8
(DGR)
62842
yes
SON-8
(DLC)
FF
yes
TPS62841DLC
TPS62841YBG
0.8 V to 1.55 V
in 50-mV steps
750 mA
yes
TPS62841DGR
TPS62842DGR
TPS62849DLC
1.8 V, 2.0 V, 2.2 V,
2.4 V to 3.6 V in 100-mV steps
750 mA
yes
3.4-V fixed output voltage
yes
Submit Documentation Feedback
Copyright © 2019–2020, Texas Instruments Incorporated
Product Folder Links: TPS62840
3
TPS62840
SLVSEC6D – JUNE 2019 – REVISED MARCH 2020
www.ti.com
6 Pin Configuration and Functions
DLC
SON-8
Bottom view
Top view
GND
VIN
MODE
EN
VOS
SW
STOP
VSET
8
1
2
7
3
6
4
5
VOS
SW
STOP
VSET
GND
VIN
MODE
EN
1
8
7
2
6
3
5
4
DGR
HVSSOP-8
Bottom view
Top view
VOS
SW
MODE
VSET
1
8
2
7
EP
3
6
4
5
GND
NC
VIN
EN
GND
NC
VIN
EN
8
1
7
2
EP
6
3
5
4
VOS
SW
MODE
VSET
YBG
WCSP-6
Top view
4
1
2
A
GND
VOS
B
VIN
C
EN
Bottom view
2
1
A
VOS
GND
SW
B
SW
VIN
VSET
C
VSET
EN
Submit Documentation Feedback
Copyright © 2019–2020, Texas Instruments Incorporated
Product Folder Links: TPS62840
TPS62840
www.ti.com
SLVSEC6D – JUNE 2019 – REVISED MARCH 2020
Pin Functions
PIN
DLC
(SON-8)
DGR
(HVSSOP-8)
YBG
(WCSP-6)
I/O
VIN
2
6
B1
PWR
VIN power supply pin. Connect the input capacitor close to this pin for best
noise and voltage spike suppression. A 4.7-µF ceramic capacitor is
required.
SW
7
2
B2
PWR
The switch pin is connected to the internal MOSFET switches. Connect the
inductor to this terminal.
GND
1
8
A1
PWR
GND supply pin. Connect this pin close to the GND terminal of the input
and output capacitors.
VSET
5
4
C2
IN
Connecting a resistor to GND sets the output voltage when the converter is
enabled. For the TPS62849, connect this pin to GND.
VOS
8
1
A2
IN
Output voltage sense pin for the internal feedback divider network and
regulation loop. When the converter is disabled, this pin discharges VOUT by
an internal MOSFET. Connect this pin directly to the output capacitor with a
short trace.
EN
4
5
C1
IN
Enable pin. A high level enables the device and a low level turns the device
off. The pin features an internal pulldown resistor, which is disabled once
the device has started up and the output voltage is regulated. The pulldown
resistor is activated again, once a low level has been detected.
STOP
6
n/a
n/a
IN
STOP Switching pin. When this pin is logic high, the converter stops
switching in order to provide a quiet supply rail. The output is powered from
the charge available in the output capacitor. When this pin is logic low, the
device immediately resumes operation. The pin features an internal
pulldown resistor, which is disabled once a high level is detected at the
input. The pulldown resistor is activated again, once a low level has been
detected.
MODE
3
3
n/a
IN
MODE pin. A low level enables Power-Save Mode operation with an
automatic transition between PFM and PWM modes. A high level forces the
converter to operated in PWM mode. This pin can be toggled during
operation. It must be terminated.
NC
n/a
7
n/a
EP
n/a
9
n/a
NAME
(1)
DESCRIPTION
This pin is not connected internally. Do not connect this pin.
PWR
Exposed thermal pad (1). The PowerPAD must be connected to GND.
For more information about the PowerPAD, see the PowerPAD™ Thermally Enhanced Package application report.
Submit Documentation Feedback
Copyright © 2019–2020, Texas Instruments Incorporated
Product Folder Links: TPS62840
5
TPS62840
SLVSEC6D – JUNE 2019 – REVISED MARCH 2020
www.ti.com
7 Specifications
7.1 Absolute Maximum Ratings (1)
MIN
MAX
VIN
–0.3
7
V
SW (DC)
–0.3
VIN + 0.3
V
SW (AC), less than 10ns (3)
–2.0
8.5
V
EN, MODE, STOP
–0.3
6.5
V
VSET
–0.3
VIN + 0.3 < 3.6
V
VOS
–0.3
3.7
V
Operating junction temperature, TJ
–40
150
°C
Storage temperature, Tstg
–65
150
°C
Pin voltage (2)
(1)
(2)
(3)
UNIT
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 GND.
While switching.
7.2 ESD Ratings
VALUE
V(ESD)
(1)
(2)
Electrostatic discharge
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins (1)
±2000
Charged device model (CDM), per JEDEC specification JESD22-C101, all
pins (2)
±500
UNIT
V
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. The human body
model is a 100-pF capacitor discharged through a 1.5-kΩ resistor into each pin.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
7.3 Recommended Operating Conditions
MIN
VIN
Supply voltage VIN
L
Effective inductance
COUT
Effective output capacitance
CIN
Effective input capacitance
CVSET
External parasitic capacitance at VSET pin
UNIT
V
2.2
2.9
µH
3
10
40
µF
1
4.7
0.909
External voltage selection resistor tolerance
µF
100
pF
267
kΩ
1%
External voltage selection resistor temperature coefficient
TJ
MAX
6.5
1.51
Nominal resistance range for external voltage selection resistor (E96 resistor series)
RSET
NOM
1.8
±200 ppm/°C
Operating junction temperature range
-40
125
°C
7.4 Thermal Information
THERMAL METRIC (1)
8 Pins DLC
Package
6 Pins YBG
Package
JEDEC PCB 51-7
RθJA
DGR EVM
JEDEC PCB 51-5
TPS62841-2EVM123
UNIT
105.6
133.4
54.4
46.9
°C/W
RθJC(top) Junction-to-case (top) thermal resistance
75.7
0.4
58.1
N/A
°C/W
RθJB
Junction-to-board thermal resistance
31.9
39.4
25.9
N/A
°C/W
ψJT
Junction-to-top characterization parameter
2.3
0.1
1.2
0.9
°C/W
ψJB
Junction-to-board characterization parameter
31.5
39.4
25.9
17.4
°C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance
n/a
n/a
11.7
N/A
°C/W
(1)
6
Junction-to-ambient thermal resistance
8 Pins DGR
Package
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
Submit Documentation Feedback
Copyright © 2019–2020, Texas Instruments Incorporated
Product Folder Links: TPS62840
TPS62840
www.ti.com
SLVSEC6D – JUNE 2019 – REVISED MARCH 2020
7.5 Electrical Characteristics
VIN = 3.6 V, TJ = –40°C to 125°C, STOP = GND, MODE = GND, typical values are at TJ = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY
IQ_NO_LOAD
No load
operating input current
EN = VIN, IOUT = 0µA, VOUT = 1.8V
device switching
60
nA
IQ_NO_LOAD
No load
operating input current
EN = VIN, IOUT = 0µA, VOUT = 1.2V
device switching
80
nA
IQ_NO_LOAD
No load
operating input current
(PWM Mode)
EN = VIN, IOUT = 0µA, VOUT = 1.8V, MODE = VIN
device switching
3
mA
IQ_VIN
Operating quiescent current into pin VIN
EN = VIN, IOUT = 0µA, VOUT = 1.55V or VOUT =
1.8V
device not switching, TJ = 25°C
(DLC package option)
36
100
nA
IQ_VOS
Operating quiescent current into pin VOS
EN = VIN, IOUT = 0µA, VOUT = 1.55V or VOUT =
1.8V
device not switching, TJ = 25°C
(DLC package option)
56
120
nA
IQ_VIN
Operating quiescent current into pin VIN
EN = VIN, IOUT = 0µA, VOUT = 1.55V or VOUT =
1.8V
device not switching, TJ = -40°C to 85°C
36
360
nA
IQ_VOS
Operating quiescent current into pin VOS
EN = VIN, IOUT = 0µA, VOUT = 1.55V or VOUT =
1.8V
device not switching, TJ = -40°C to 85°C
56
170
nA
EN = VIN, VOUT = 3.3V
device not switching
70
nA
EN = VIN, VOUT < 1.5 V
device not switching
5
nA
EN, STOP = VIN, 3V < VOUT < 3.3V
TJ = -40°C to 85°C
5
IQ_VOS
Operating quiescent current into VOS pin
100
nA
IQ_100%_MODE
Operating quiescent current 100% Mode
VIN = VOUT = 3.3V, TJ = -40°C to 85°C
IQ_VIN_STOP
Operating quiescent current into pin VIN
STOP = High, VOUT = 1.8V, TJ = -40°C to 85°C
70
175
µA
ISD
Shutdown current
EN = GND, shutdown current into VIN
VSET = GND, TJ = -40°C to 85°C
25
300
nA
VTH_UVLO+
VTH_UVLO–
Undervoltage lockout threshold
120
nA
Rising VIN
1.72
1.8
V
Falling VIN
1.45
1.75
V
EN, MODE, STOP INPUTS
VIH_TH
High level input voltage
VIL_TH
Low level input voltage
1.1
IIN
Input bias current
MODE input, TJ = -40°C to 85°C
RPD
Internal pull-down resistance
EN, STOP inputs
V
1
200
0.4
V
25
nA
450
Submit Documentation Feedback
Copyright © 2019–2020, Texas Instruments Incorporated
Product Folder Links: TPS62840
kΩ
7
TPS62840
SLVSEC6D – JUNE 2019 – REVISED MARCH 2020
www.ti.com
Electrical Characteristics (continued)
VIN = 3.6 V, TJ = –40°C to 125°C, STOP = GND, MODE = GND, typical values are at TJ = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
POWER SWITCHES
RDS(ON)
High-side MOSFET
on-resistance
(DLC, YBG package)
VIN = 3.6V, I = 200mA, TJ = -40°C to 85°C
430
600
VIN = 5V, I = 200mA, TJ = -40°C to 85°C
340
465
Low-side MOSFET
on-resistance
(DLC, YBG package)
VIN = 3.6V, I = 200mA, TJ = -40°C to 85°C
170
240
VIN = 5V, I = 200mA, TJ = -40°C to 85°C
135
180
High-side MOSFET
on-resistance
(DGR package)
VIN = 3.6V, I = 200mA, TJ = -40°C to 85°C
460
630
VIN = 5V, I = 200mA, TJ = -40°C to 85°C
370
495
Low-side MOSFET
on-resistance
(DGR package)
VIN = 3.6V, I = 200mA, TJ = -40°C to 85°C
200
270
VIN = 5V, I = 200mA, TJ = -40°C to 85°C
165
210
0.15
0.225
0.3
A
1.0
1.2
1.4
A
Soft-start
switch current limit (1)
ILIMF_SS
High-side MOSFET switch current limit (1)
ILIMF
mΩ
mΩ
mΩ
mΩ
Low-side MOSFET switch current limit
1.0
A
ILIMN
Negative current limit
533
mA
tI_LIM_DELAY
Current limit propagation delay
50
ns
ILKG_SW
Leakage current
into SW pin
10
nA
VSW = 1.8V, TJ = -40°C to 85°C
OUTPUT VOLTAGE DISCHARGE
IDISCHARGE_VOS
Output discharge current
EN = GND, sink current into VOS pin, over VIN
range
VOUT = 1.8V, TJ = -40°C to 85°C
16
35
44
mA
THERMAL PROTECTION
Thermal shutdown temperature
TSD
Rising junction temperature, PWM Mode
Thermal shutdown hysteresis
160
°C
5
°C
OUTPUT
VOUT
Output voltage accuracy
PWM Mode, IOUT = 0 mA, VOUT >= 1.8 V
PWM Mode, IOUT = 0 mA, VOUT