Download TPS63050

Advanced Low Power Solutions
Buck-Boost in HotRod™ Package
TPS630250
TI Information – Selective Disclosure
1
TPS630250
Industry smallest 2AOUT single-inductor Buck-Boost
Features
Benefits
• 2.3V to 5.5VIN, 2A output current supported over
entire VIN range
• Supports new chemistry Li-Ion batteries which
enable lower cutoff voltages
• Automatic Power-Save Mode with 35µA IQ
• Efficiency higher than 90% (97% peak) over the
complete load range extends battery life
• VOUT ripple <50mV in PFM mode
• High VOUT accuracy over the complete load range
• Protects the device against reverse current as well
as eliminates parasitic drain from battery when
• TPS630250 (adj VOUT), ‘251(2.9VOUT), ‘252(3.3VOUT) converter is disabled
• Load Disconnect
• 20 pin WCSP 1.7x 2.1mm
• Total solution size <44 mm2
• 14 pin HotRod™ QFN 2.5x3mm
•
NEW
Applications
•
•
•
•
Smart Grid back-up power
ePOS Point of Sales
Smartphones, Ultrabooks and accessories
Single Li-Ion cell powered applications
TPS630250 Easy-to-Use HotRod™ QFN
QFN
WCSP
HotRod™
Flexible
Assembly easy
Hi Resistance
Good thermals
Low power
Handling bare die
Low Resistance
Bad thermals
Best Performance
Like a QFN
Low Resistance
Good thermals

Die
Leadframe
Board
Board

Board
Improved
Thermal Performance
low Temp Rise
at Full Power
Bottom View
VIN=3.6V, VOUT=3.3V, IOUT=3A
TI Information – Selective Disclosure
TPS630250 in HotRod™ - solution size
HotRod™
2.5mm
1.6mm
WCSP
2mm
3mm
Solution size:
49 mm2 (HotRod)
Layout Example using HotRod™
Solution size:
44 mm2 (WCSP)
Layout Example using WCSP
Buck-Boost in QFN: competitive landscape
NEW
NEW
TPS63050
ISL9110
TPS63025
RT6154
Current Limit
IOUT max
Rds_on
1A
0.5A
140mΩ
2A
1A
120mΩ
4A
2A
<50mΩ
5A
3A
50mΩ (typ)
External components
L=1.5µH
CIN=10µF
COUT=10µF
L=2.2µH
CIN=10µF
COUT=10µF
L=1µH
CIN=10µF
COUT=2x 22µF
L=2.2µH
CIN=20µF
COUT=100µF
IC size
QFN 2.5 x 2.5 mm
HotRod™
QFN 3 x 3 mm
QFN 2.5 x 3 mm
HotRod™
QFN 3 x 4 mm
Solution size
19 mm2
93 mm2
49 mm2
120 mm2
VRIPPLE
<50mV
~50mV
<30mV
~80mV
VOUT Accuracy
1.1% (PWM mode)
2% (PWM mode)
1% (PWM mode)
1% (PWM mode)
Efficiency
Up to 96%
Up to 95%
95% (peak 97%)
Up to 96%
Switching frequency
2.5 MHz
2.5 MHz
2.5 MHz
2.4 MHz
TI Information – Selective Disclosure
TPS630250 buck-boost key advantages
• Integrated Soft Start allows a smooth start-up time
• Output voltage ripple is 50mV max under worst conditions
• Automatic buck-boost transition and PFM to PWM transition.
• Smallest package solution size:
– WCSP package:
• Very small external components allow <44mm2 total footprint.
• Competition has larger IC and passives to build same solution.
– HotRod package:
NEW
• Easy-to-use QFN-similar package
• Improved thermal performance
• Lower manufacturing costs
TI Information – Selective Disclosure
Buck-Boost Converter – TPS63…
Switch
Current
Limit
Buck-Boost
Preview
VOUT
4.5A
TPS63025
4.0A
TPS63020
TPS63024
Boost in
SEPIC Conf.
NEW
package
2.3 to 3.6V
WCSP 1.8x2.1mm
HotRod™QFN 2.5x3mm
1.2 to 5.5V
QFN 3x4mm
2.5 to 3.6V
WCSP 1.8x2.1mm
Vin to 38V
TSSOP 5x6mm
2.5 to 8V
QFN 3x3mm
1.2 to 5.5V
WCSP 1.9x2.1mm
1.2 to 5.5V
QFN 3x3mm
Vin to 38V
SON 2x2mm
2.5 to 5.5V
QFN 4x4mm
TSSOP 5x6mm
2.5 to 5.5V
WSCP 1.2x1.6mm
HotRod™QFN 2.5x2.5mm
1.2 to 5.5V
WSCP 1.1x1.9mm
SON 2.5x2.5mm
-15 to -2V
SON 3x3mm
3.0A
TPS61175
2.25A
TPS63060
TPS63010
2.2A
1.8A
TPS63000
1.2A
TPS61170
1.1A
TPS61130
TPS63050
1.0A
TPS63030
1.0A
TPS63700 Inverter
1.8 2.0 2.3 2.5 2.9 3.0 3.3
TI Information – Selective Disclosure
5.5
6.0
12.0 16V18V
Input Voltage
Where to use Buck-Boost
BATTERY
POWER
CONVERSION
SYSTEM LOADS
Audio
WiFi Module
Screen Sensors
4.3 V
PMIC
2.7 V
1s xp: 1 cell in series,
multiple cells in parallel,
typical architecture
for mobile devices
LCD Display
eMMC card
SD card
LPDDR
Possible System Solutions
2A
0.7A
TPS630250 Buck-Boost
•
Power the LDO
section in the PMIC
•
•
Highest efficiency
happens when buckboost Vout is approx.
3.1V.
2A continuous
output current.
TPS61280A Boost-bypass
• Power single-input PMIC
(both buck and LDO
sections) and RFPA.
• Highest efficiency happens
when boost-bypass Vout is
approx. 3.4V.
• Up to 4A output current.
TI Information – Selective Disclosure
Classical Buck-Boost Converter versus
TPS630xx Buck-Boost
Competition
𝐼𝐿𝑜𝑎𝑑 = 𝐼𝑙,𝑎𝑣𝑔 ∙
𝑡𝐴𝐵 + 𝑡𝐴𝐷 + 𝑡𝐶𝐷
⋮ 𝑡𝐴𝐵 ≪ 𝑡𝐴𝐷 + 𝑡𝐶𝐷 → 𝐼𝐿𝑜𝑎𝑑 ≅ 𝐼𝑙,𝑎𝑣𝑔
𝑡𝐴𝐷 + 𝑡𝐶𝐷
TPS630XX
Buck-Boost Mode
Ch1:L1,Ch2=L2, Ch3=IL;Ch4=Vout+AC coupled
TPS630xx family efficiency
stays flat over VIN
TPS630xx family
Competition
Buck-Boost operation
Efficiency dip
TPS63025 performance
Efficiency
50mV Output voltage ripple