tea1206t NXP Semiconductors, tea1206t Datasheet - Page 2

• Manufacturer Part Number: tea1206t
• Description: High Efficiency Dc/dc Converter
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
QUICK REFERENCE DATA
2001 Mar 14
Voltage levels
U
V
V
V
D
V
V
O
V
Current levels
I
I
I
SYMBOL
q
shdwn
LX
Fully integrated DC/DC converter circuit
Upconversion or downconversion
Start-up from 1.8 V input
Adjustable output voltage
High efficiency over large load range
Power handling capability up to 1 A continuous
average current
560 kHz switching frequency
Low quiescent power consumption
Synchronizes to external 9 to 20 MHz clock
True current limit for Li-ion battery compatibility
Up to 100% duty cycle in down mode
Undervoltage lockout
Shut-down function
8-pin SO package.
I
O
I(start)
I
O
fb
PCONVERSION
OWNCONVERSION
High efficiency DC/DC converter
UTPUT LOOP
input voltage
output voltage
start-up input voltage
input voltage
output voltage
feedback voltage
quiescent current on pin 3 in
downconversion configuration
shut-down current
maximum continuous current on pin 4
;
PIN
;
PIN
U/D = LOW
U/D = HIGH
PARAMETER
I
V
L
I
< 200 mA
= 3.6 V
CONDITIONS
2
APPLICATIONS
GENERAL DESCRIPTION
The TEA1206T (see Fig.1) is a fully integrated DC/DC
converter. Efficient, compact and dynamic power
conversion is achieved using a novel, digitally controlled
concept like Pulse Width Modulation (PWM) or Pulse
Frequency Modulation (PFM), integrated low R
power switches with low parasitic capacitances, and fully
synchronous rectification.
The device operates at 560 kHz switching frequency
which enables the use of external components with
minimum size. Deadlock is prevented by an on-chip
undervoltage lockout circuit.
Efficient behaviour during short load peaks and
compatibility with Li-ion batteries is guaranteed by an
accurate current limiting function.
Cellular and cordless phones, Personal Digital
Assistants (PDAs) and others
Supply voltage source for low-voltage chip sets
Portable computers
Battery backup supplies
Cameras.
V
2.80
1.40
2.80
1.25
1.19
65
I(start)
MIN.
1.60
1.24
75
2
TYP.
Product specification
TEA1206T
5.50
5.50
1.85
5.50
5.50
1.29
85
10
1.0
MAX.
DSon
CMOS
V
V
V
V
V
V
A
UNIT
A
A