Datasheet

GND
A1
B1
C1
A2
B2
C2
FB
SW
MODE
VIN
EN
TPS62660
CSP-6
(TOP VIEW)
MODE
C1
A2
B2
C2
A1
B1
VIN
EN
GND
FB
SW
TPS62660
CSP-6
(BOTTOMVIEW)
GateDriver
Anti
Shoot-Through
PowerSaveMode
SwitchingLogic
+
-
Frequency
Control
FB
R
1
R
2
SW
GND
Soft-Start
EN VIN
CurrentLimit
Detect
Undervoltage
Lockout
BiasSupply
Bandgap
Thermal
Shutdown
NegativeInductor
CurrentDetect
VIN
MODE
V = 0.8 V
RE F
V
REF
TPS62660, TPS62665
SLVS871C –FEBRUARY 2010– REVISED JULY 2011 www.ti.com
PIN ASSIGNMENTS
PIN FUNCTIONS
PIN
I/O DESCRIPTION
NAME NO.
FB C1 I Output feedback sense input. Connect FB to the converter’s output.
VIN A2 I Power supply input.
SW B1 I/O This is the switch pin of the converter and is connected to the drain of the internal Power MOSFETs.
This is the enable pin of the device. Connecting this pin to ground forces the device into shutdown mode. Pulling
EN B2 I
this pin to V
I
enables the device. This pin must not be left floating and must be terminated.
This is the mode selection pin of the device. This pin must not be left floating and must be terminated.
MODE = LOW: The device is operating in regulated frequency pulse width modulation mode (PWM) at high-load
MODE A1 I
currents and in pulse frequency modulation mode (PFM) at light load currents.
MODE = HIGH: Low-noise mode enabled, regulated frequency PWM operation forced.
GND C2 – Ground pin.
FUNCTIONAL BLOCK DIAGRAM
4 Copyright © 2010–2011, Texas Instruments Incorporated