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TS33003 Datasheet Preview

TS33003 Datasheet

High Efficiency Synchronous 1/2/3A DC/DC Buck Converter

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TRIUNE PRODUCTS
Features
• Fixed Output option has automatic low power PFM mode
for reduced quiescent current at light loads
• 5MHz +/- 10% fixed switching frequency
• 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: 2.5V to 5.5V
• Voltage mode PWM control with input voltage feed-
• Forward compensation
• Voltage supervisor for VOUT 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 VOUT overvoltage
• Less than 200nA 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
TS33001/2/3
High Efficiency Synchronous 1/2/3A
DC/DC Buck Converter, 5Mhz
Description
The TS33001/2/3 (1/2/3A) are DC/DC synchronous switching
regulators with fully integrated power switches, internal
compensation, and full fault protection. The switching
frequency of 5MHz 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 TS33001/2/3 utilizes PWM voltage mode feedback with input
voltage feed-forward to provide a wide input voltage range
without the need for external compensation.
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.
The TS33001/2/3 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.
Typical Applications
VCC
nLP
EN
Fixed Output
VCC
22uF
VSW
VOUT
Sense
FB
H
nLP
EN
PG
VOUT
10uF
VCC or VOUT
10 kohm
(optional)
PG
TS33001/2/3
Final Datasheet Rev 1.6
January 15, 2016
www.semtech.com
1 of 16
Semtech
Proprietary & Confidential




Semtech

TS33003 Datasheet Preview

TS33003 Datasheet

High Efficiency Synchronous 1/2/3A DC/DC Buck Converter

No Preview Available !

Pinout
VSW
VSW
VCC
VCC
TS33001/2/3
VCC
TEST
OUT
GND
EN
Pin Description
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Name
VSW
VCC
VCC
GND
FB
V Sense
OUT
nLP
PG
EN
TEST OUT
VCC
VSW
PGND
VSW
VSW
PGND
Pin Function
Switching Voltage Node
Input Voltage
Input Voltage
Description
Connect to 1.5uH inductor. Short to Pins 12, 14, & 15
Input voltage supply. Short to Pins 3 & 11
Input voltage supply. Short to Pins 2 & 11
GND
Ground for the internal circuitry of the device
Feedback Input
Output Voltage Sense
nLP Input
PG Output
Enable Input
Feedback voltage for the regulator when used in adjustable mode.
Connect to the output voltage resistor divider for adjustable mode
and No Connection for fixed output modes
Output Voltage Sense. Requires kelvin connection to 4.7uF
output capacitor
Forcing this pin high prevents the device from going into Low Power
PFM mode operation
Power Good indicator Open-drain output.
Input high voltage enables the device. Input low disables the device.
Test Mode Output
Connect to GND. For internal testing use only.
Input Voltage
Input voltage supply. Short to Pins 2 & 3
Switching Voltage Node
Connect to 1µH inductor. Short to Pins 1, 14, & 15
Power GND
GND supply for internal low-side FET/integrated diode. Short to Pin 16
Switching Voltage Node
Connect to 1µH inductor. Short to Pins 1, 12, & 15
Switching Voltage Node
Connect to 1µH inductor. Short to Pins 1, 12, & 14
Power GND
GND supply for internal low-side FET/integrated diode.
Short to Pin 13
TS33001/2/3
Final Datasheet Rev 1.6
January 15, 2016
www.semtech.com
2 of 16
Semtech
Proprietary & Confidential


Part Number TS33003
Description High Efficiency Synchronous 1/2/3A DC/DC Buck Converter
Maker Semtech
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TS33003 Datasheet PDF





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