TS33000 Datasheet, PDF (1/12 Pages) List of Unclassifed Manufacturers – High Efficiency Synchronous DC/DC Buck Converter

TS33000
Version 1.4
High Efficiency Synchronous DC/DC Buck Converter
DESCRIPTION
The TS33000 is a DC/DC synchronous switching
regulator with fully integrated power switches, internal
compensation, and full fault protection. The switching
frequency of 2.25MHz enables the use of extremely
small filter components, resulting in smaller board
space and reduced BOM costs.
When the input current is greater than approximately
50mA, the TS33000 utilizes PWM voltage mode
feedback with input voltage feed-forward to provide a
wide input voltage range without the need for external
compensation.
For the Fixed Output option, when the input current is
less than 50mA, the device uses a PFM mode to
provide increased efficiency at light loads. The cross
over between PFM mode and PWM is automatic and
has hysteresis to prevent oscillation between the
modes. Additionally, the nLP mode pin can be used to
force the device into PWM mode to reduce the output
ripple, if needed (Fixed Output only).
The TS33000 integrates a wide range of protection
circuitry; including input supply under-voltage
lockout, output under-voltage, output over-voltage,
soft start, high side FET and low side FET current
limits, and thermal shutdown.
FEATURES
 Fixed Output option has automatic low power PFM
mode for reduced quiescent current at light loads
 2.25MHz +/- 10% fixed switching frequency
 Adjustable version output voltage range:
0.6V to 5V with +/- 1.5% reference across
temperature
 Fixed output voltages: 0.8V, 0.9V, 1.2V, 1.5V, 1.8V,
2.5V, and 3.3V with +/- 2% output tolerance
 Input voltage range: 2.0V to 5.5V (6.0V Abs Max)
 Voltage mode PWM control with input voltage feed-
forward compensation
 Voltage supervisor for V_OUT reported at the PG pin
 Input supply under voltage lockout
 Soft start for controlled startup with no overshoot
 Full protection for over-current, over-temperature,
and V_OUT overvoltage
 Less than 100nA in shutdown mode
 Multiple enable pins for flexible system sequencing
 Low external component count
 Junction operating temperature -40C to 125C
 Packaged in a 16 pin QFN (3x3)
APPLICATIONS
 Point of load
 Systems with deep submicron ASICs/FPGAs
 Set-top box
 Communications equipment
 Portable and handheld equipment
TYPICAL APPLICATION
Fixed Output
Adjustable Output
VCC
VCC
VSW
1.5uH
VOUT
VCC
VCC
1.5uH
VSW
2x4.7uF
VOUT
Sense
4.7uF
2x4.7uF
VOUT
Sense
FB
FB
VCC or VOUT
nLP
nLP
EN
EN
PG
10 kohm
(optional)
PG
nLP
nLP
EN
EN
PG
RTOP
RBOT
VOUT
4.7uF
VCC or VOUT
10 kohm
(optional)
PG
Specifications subject to change
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