Datasheet
TLV62084
L1
C1
R1
R2
V
IN
POWER GOOD
SW
VOS
VIN
EN
GND
GND
PG
FB
C2
R3
V
OUT
C3
2.7 V to 5.5 V
TLV62080, TLV62084
www.ti.com
SLVSAK9E –OCTOBER 2011–REVISED FEBRUARY 2014
8.4 Device Functional Modes
8.4.1 Power Save Mode
As the load current decreases the TLV62080 and TLV62084 devices enter the power save mode operation.
During power save mode the converter operates with reduced switching frequency in PFM mode and with a
minimum quiescent current maintaining high efficiency. The power save mode occurs when the inductor current
becomes discontinuous which is based on a fixed on time architecture. The typical on time is given by t
on
= 400
ns × (V
OUT
/ V
IN
). The switching frequency over the whole load current range is shown in Figure 8.
9 Application and Implementation
9.1 Application Information
The devices are designed to operate from an input voltage supply range between 2.5 V (2.7 V for the TLV62084
device) and 5.5 V with a maximum output current of 2 A (1.2 A for the TLV62080 device). The TLV6208x device
operates in PWM mode for medium to heavy load conditions and in power save mode at light load currents.
In PWM mode the TLV6208x converter operates with the nominal switching frequency of 2 MHz which provides a
controlled frequency variation over the input voltage range. As the load current decreases, the converter enters
power save mode, reducing the switching frequency and minimizing the IC quiescent current to achieve high
efficiency over the entire load current range.
The WEBENCH software uses an iterative design procedure and accesses a comprehensive database of
components when generating a design. See the Documentation Support section for additional documentation.
9.2 Typical Application
Figure 9. Typical Application Schematic
9.2.1 Design Requirements
Use the following typical application design procedure to select external components values for the TLV6208x
device.
Table 2. Design Parameters
DESIGN PARAMETERS EXAMPLE VALUES
Input Voltage Range 2.8 V to 4.2 V
Output Voltage 1.2 V
Transient Response ±5% V
OUT
Input Voltage Ripple 400 mV
Output Voltage Ripple 30 mV
Output Current Rating 2 A
Operating frequency 2 MHz
Copyright © 2011–2014, Texas Instruments Incorporated Submit Documentation Feedback 11
Product Folder Links: TLV62080 TLV62084