T
LT
P
S
6
O
2
D
1
E
0
0
,
T
P
S
6
O
2
1
W
0
1
E
,
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T
B
P
S
U
6
C
2
K
1
0
2, TP S 62 10 3
C ON V ER TE R
ą
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U
I
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L
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W
Ć
P
SLUS446B – MAY 2000 – REVISED DECEMBER 2000
X
applications
D
2.5-V to 9-V Input Range
0.8-V to 8-V Output Range
D
D
D
D
D
Cellular Telephones
Satellite Telephones
D
D
D
D
D
Dual-Auto-Mode for High-Efficiency
at Light Loads
GPS Devices
Digital Still Cameras
PDAs and Handheld Cameras
Externally Synchronizable
0% to 100% Duty Cycle
D PACKAGE
(TOP VIEW)
Low-Quiescient, Standby,
and Shutdown Currents
D
8-Pin SOIC Package
VIN
SW
1
2
3
4
8
7
6
5
SD/SYNC
MODE
PGND
FB
D
Four PWM Frequency
Versions (Maximum 2 MHz)
AGND
COMP
description
The TPS6210x family of low-power high-efficiency buck converters is designed to operate from 1 or 2 li-ion
cell battery packs. This part, with its wide input range of 2.5 V to 9 V, has an adjustable output from 0.8 V to
8 V and is capable of 500-mA output current. The TPS6210x family of synchronizable dc-to-dc converters is
available in four different operating frequencies: 300 kHz, 600 kHz, 1 MHz, and 2 MHz. The circuit can be
allowed to run at a fixed frequency, or sychronized, using the dual function SD/SYNC input pin.
The TPS6210x family is highly efficient at both low and high output currents. The tri-function MODE input pin
is used to select constant-frequency, auto-mode, or light-load modes of operation. The multimode operation
allows the IC to select the most efficient operating mode, or if desirable, the user can determine which of three
modes to operate in. In the auto-mode, the output load detector circuitry determines if the converter should be
running in the constant-frequency, heavy-load mode, or pulsed-variable frequency, light-load mode.
The TPS6210x family also has a shutdown mode for optimum battery shelf life. The IC utilizes three methods
of overload protection, including thermal shutdown and two levels of overcurrent protection. The TPS6210x is
available in the small outline 8-pin SOIC package.
typical application (automatic mode switcher)
L1
µ
15
H
OUT 3.3 V
TPS62102
0 mA TO 500 mA
1
2
VIN
SW
8
7
C4
D1
10BQ040
R1
C1
µ
10
MLC
F
+
+
Ω
1 k
µ
1.0
F
LI–ION
LI–ION
SD/SYNC
PGND
R2
113 k
C3
100 pF
Ω
3
4
MODE
AGND
FB
6
5
R4
C2
1 n F
Ω
30 k
R3
COMP
Ω
36 k
UDG–00059
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.
Copyright 2000, Texas Instruments Incorporated
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