Datasheet

SW
MOSFET Driver
Anti Shoot Through
Converter Control
Logic
High Side
Current
Sense
Vref
0.8V
Comparator
Error Amplifier
PVIN
AVIN
PGND
AGND
FREQ
EN
EN
M1
M2
VOS
SW
FB
Direct Control
and
Compensation
ramp
Timer
ton
PGND
DCS - Control™
Charge Pump
for
Gate driver
CP CN
SS
I
ss
Voltage clamp
Vref
÷1.56
PVIN
Hiccup
current limit
#32 counter
Output voltage
discharge
logic
200Ω
M3
VREF
PG
VFB
Bandgap
Undervoltage
Lockout
Thermal shutdown
400kΩ
Adjustable
only
Vin
400kΩ
400kΩ
High =1.4 MHz
Low = 2.8 MHz
R1
(1)
R2
(1)
R3
(1)
TPS62090 , TPS62091 , TPS62092 , TPS62093
SLVSAW2B –MARCH 2012–REVISED APRIL 2014 www.ti.com
9 Detailed Description
9.1 Overview
The TPS6209x synchronous switched mode converters are based on DCS™ Control (Direct Control with
Seamless transition into Power Save Mode). This is an advanced regulation topology that combines the
advantages of hysteretic and voltage mode control.
The DCS™ Control topology operates in PWM (Pulse Width Modulation) mode for medium to heavy load
conditions and in Power Save Mode at light load currents. In PWM, the converter operates with its nominal
switching frequency of 2.8 MHz/1.4 MHz having 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. DCS™ Control
supports both operation modes (PWM and PFM) using a single building block having a seamless transition from
PWM to Power Save Mode without effects on the output voltage. Fixed output voltage versions provide smallest
solution size combined with lowest quiescent current. The TPS6209x family offers excellent DC voltage
regulation and load transient regulation, combined with low output voltage ripple, minimizing interference with RF
circuits.
9.2 Functional Block Diagram
(1) R1, R2, R3 are implemented in the fixed output voltage version only.
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Product Folder Links: TPS62090 TPS62091 TPS62092 TPS62093