TPS62110_15 Datasheet, PDF (1/34 Pages) Texas Instruments – TPS6211x 17-V, 1.5-A, Synchronous Step-Down Converter

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TPS62110, TPS62111, TPS62112, TPS62113
SLVS585E – JULY 2005 – REVISED JUNE 2015
TPS6211x 17-V, 1.5-A, Synchronous Step-Down Converter
1 Features
•1 High-Efficiency Synchronous Step-Down
Converter With up to 95% Efficiency
• 3.1-V to 17-V Operating Input Voltage Range
• Adjustable Output Voltage Range: 1.2 V to 16 V
• Fixed Output Voltage Options Available in
3.3 V and 5 V
• Synchronizable to External Clock: Up to 1.4 MHz
• Up to 1.5-A Output Current
• High Efficiency Over a Wide Load-Current
Range Due to PFM/PWM Operation Mode
• 100% Maximum Duty Cycle for Lowest Dropout
• 20-µA Quiescent Current (Typical)
• Overtemperature and Overcurrent Protected
• Available in 16-Pin VQFN Package
2 Applications
• Point-of-Load Regulation From 12-V Buses
• Organizers, PDAs, and Handheld PCs
• Handheld Scanners
3 Description
The TPS6211x devices are a family of low-noise
synchronous step-down DC-DC converters that are
ideally suited for systems powered from a 2- to 4-cell
Li-ion battery or from a 12-V or 15-V rail.
The TPS6211x devices are synchronous pulse width
modulation (PWM) converters with integrated N- and
P-channel power MOSFET switches. Synchronous
rectification is used to increase efficiency and to
reduce external component count. To achieve highest
efficiency over a wide load-current range, the
converter enters a power-saving, pulse frequency
modulation (PFM) mode at light load currents.
Operating frequency is typically 1 MHz, allowing the
use of small inductor and capacitor values. The
device can be synchronized to an external clock
signal in the range of 0.8 MHz to 1.4 MHz. For low-
noise operation, the converter can be operated in
PWM-only mode. In shutdown mode, the current
consumption is reduced to less than 2 µA. The
TPS6211x family of devices are available in the 16-
pin (RSA) VQFN package, and operate over a free-
air temperature range of –40°C to 85°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS62110
TPS62111
TPS62112
VQFN (16)
4.00 mm × 4.00 mm
TPS62113
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Typical Application Schematic
V_I = 3.8 V to 17 V
C_I = 10 mF
25 V
1 mF
VIN
VIN
EN
VINA
TPS62111
AGND
LBI
SYNC
SW
SW
PG
LBO
FB
GND GND PwPD PGND PGND
6.8 mH
1 MW
V_O = 3.3 V
C_O = 22 mF
6.3 V
TPS62111
Efficiency vs Output Current
100
4.2 V
90
80
70
5V
60
8.4 V
50
12 V
40
30
20
10
0
0.0001
V_O = 3.3 V
T_A = 25^oC
PFM Mode
0.001 0.01
0.1
1
10
I_O - Output Current- A
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.