TPS64201 Controller Datasheet

TPS64201 Datasheet, PDF, Equivalent


Part Number

TPS64201

Description

SOT23 Step-Down Controller

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download TPS64201 Datasheet


TPS64201
www.ti.com
SOT23 STEPĆDOWN CONTROLLER
TPS64200, TPS64201
TPS64202, TPS64203
SLVS485 − AUGUST 2003
FEATURES
D Step-Down Controller for Applications With
up to 95% Efficiency
D 1.8-V to 6.5-V Operating Input Voltage Range
D Adjustable Output Voltage Range From 1.2 V
to VI
D High Efficiency Over a Wide Load Current
Range
D 100% Maximum Duty Cycle for Lowest
Dropout
D Internal Softstart
D 20-µA Quiescent Current (Typical)
D Overcurrent Protected
D Available in a SOT23 Package
APPLICATIONS
D USB Powered Peripherals
D Organizers, PDAs, and Handheld PCs
D Low Power DSP Supply
D Digital Cameras
D Hard Disk Drives
D Portable Audio Players
DESCRIPTION
The TPS6420x are nonsynchronous step-down
controllers that are ideally suited for systems powered
from a 5-V or 3.3-V bus or for applications powered from
a 1-cell Li-Ion battery or from a 2- to 4-cell NiCd, NiMH, or
alkaline battery. These step-down controllers drive an
external P-channel MOSFET allowing design flexibility. To
achieve highest efficiency over a wide load current range,
this controller uses a minimum on time, minimum off time
control scheme and consumes only 20-µA quiescent
current. The minimum on time of typically 600 ns
(TPS64203) allows the use of small inductors and
capacitors. When disabled, the current consumption is
reduced to less than 1 µA. The TPS6420x is available in
the 6-pin SOT23 (DBV) package and operates over a free
air temperature range of −40°C to 85°C.
TYPICAL APPLICATION CIRCUIT
5V
10 µF
TPS64200
1 EN
SW 6
2 GND VIN 5
3 FB ISENSE 4
ZHCS2000
Rs = 33 m
Si5447DC
10 µH
R1
620 k
R2
360 k
3.3 V / 2 A
47 µF
PosCap
6TPA47M
TPS64200
EFFICIENCY
vs
100 LOAD CURRENT
90
80
VI = 4.2 V
70
60
50
40
30
20
TA = 25°C,
10 VO = 3.3 V
0
0.0001 0.001 0.01
0.1
IO − Load Current − A
1
10
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.
Copyright 2003, Texas Instruments Incorporated

TPS64201
TPS64200, TPS64201
TPS64202, TPS64203
SLVS485 − AUGUST 2003
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during
storage or handling to prevent electrostatic damage to the MOS gates.
ORDERING INFORMATION
PLASTIC SOT23-6(1) (2)
(DBV)
OUTPUT VOLTAGE
MINIMUM ON-TIME
TPS64200DBVR
TPS64201DBVR
Adjustable
1.2 V to VI
Adjustable
1.2 V to VI
ON time = 1.6 µs
Variable minimum on time
TPS64202DBVR
Adjustable
1.2 V to VI
Variable minimum on time
TPS64203DBVR
Adjustable
1.2 V to VI
ON time = 600 ns
(1) The R suffix indicates shipment in tape and reel with 3000 units per reel.
(2) The T suffix indicates a mini reel with 250 units per reel.
MINIMUM OFF-TIME
OFF time = 600 ns
OFF time = 600 ns
OFF time = 300 ns
OFF time = 600 ns
MARKING
PJAI
PJBI
PJCI
PJDI
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1)
Supply voltage, VIN
Voltage at EN, SW, ISENSE
Voltage at FB
Maximum junction temperature, TJ
Operating free−air temperature, TA
Storage temperature, Tsgt
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
−0.3 V to 7 V
−0.3 V to VIN
−0.3 V to 3.3 V
150°C
−40°C to 85°C
−65°C to 150°C
300°C
(1) 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.
PACKAGE DISSIPATION RATINGS
PACKAGE
TA 255C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 705C
POWER RATING
SOT23−6
400 mW
4 mW/°C
220 mW
NOTE: The thermal resistance junction to ambient of the 6−pin SOT23 package is 250°C/W.
TA = 855C
POWER RATING
180 mW
RECOMMENDED OPERATING CONDITIONS
Supply voltage at VIN
Operating junction temperature
MIN NOM
1.8
−40
MAX
6.5
125
UNIT
V
°C
2


Features www.ti.com SOT23 STEPĆDOWN CONTROLLER TPS64200, TPS64201 TPS64202, TPS64203 SLVS485 − AUGUST 2003 FEATURES D Ste p-Down Controller for Applications With up to 95% Efficiency D 1.8-V to 6.5-V Operating Input Voltage Range D Adjusta ble Output Voltage Range From 1.2 V to VI D High Efficiency Over a Wide Load C urrent Range D 100% Maximum Duty Cycle for Lowest Dropout D Internal Softstart D 20-µA Quiescent Current (Typical) D Overcurrent Protected D Available in a SOT23 Package APPLICATIONS D USB Power ed Peripherals D Organizers, PDAs, and Handheld PCs D Low Power DSP Supply D Digital Cameras D Hard Disk Drives D Po rtable Audio Players DESCRIPTION The TP S6420x are nonsynchronous step-down con trollers that are ideally suited for sy stems powered from a 5-V or 3.3-V bus o r for applications powered from a 1-cel l Li-Ion battery or from a 2- to 4-cell NiCd, NiMH, or alkaline battery. These step-down controllers drive an externa l P-channel MOSFET allowing design flexibility. To achieve highest .
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