TPS62690 Datasheet, PDF (1/27 Pages) Texas Instruments – 500-mA / 600-mA, 4-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER

CSP-6
www.ti.com
TPS62690, TPS62691
SLVS965 – MARCH 2011
500-mA / 600-mA, 4-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER
IN CHIP SCALE PACKAGING
Check for Samples: TPS62690, TPS62691
FEATURES
1
•2 95% Efficiency at 4MHz Operation
• 19μA Quiescent Current
• 4MHz Regulated Frequency Operation
• High Duty-Cycle Operation
• ±2% Total DC Voltage Accuracy
• Best in Class Load and Line Transient
• Excellent AC Load Regulation
• Low Ripple Light-Load PFM Mode
• ≥40dB V_IN PSRR (1kHz to 10kHz)
• Internal Soft Start, 250-μs Start-Up Time
• Integrated Active Power-Down Sequencing
(Optional)
• Current Overload and Thermal Shutdown
Protection
• Three Surface-Mount External Components
Required (One 2012 MLCC Inductor, Two 0402
Ceramic Capacitors)
• Complete Sub 1-mm Component Profile
Solution
• Total Solution Size <12 mm²
• Available in a 6-Pin NanoFree™ (CSP)
100
V_I = 3.6 V,
95 V_O = 2.85 V
90
Efficiency
85
PFM/PWM Operation
80
75
Power Loss
70
PFM/PWM Operation
65
60
55
50
0.1
1
10
100
I_O - Load Current - mA
150
135
120
105
90
75
60
45
30
15
0
1000
Figure 1. Efficiency vs. Load Current
APPLICATIONS
• LDO Replacement
• Cell Phones, Smart-Phones
• Portable Audio, Portable Media
• DC/DC Micro Modules
DESCRIPTION
The TPS6269x device is a high-frequency
synchronous step-down dc-dc converter optimized for
battery-powered portable applications. Intended for
low-power applications, the TPS6269x supports up to
600-mA load current, and allows the use of low cost
chip inductor and capacitors.
The device is ideal for mobile phones and similar
portable applications powered by a single-cell Li-Ion
battery. Different fixed voltage output versions are
available from 2.2V to 2.9V.
The TPS6269x operates at a regulated 4-MHz
switching frequency and enters the power-save mode
operation at light load currents to maintain high
efficiency over the entire load current range.
The PFM mode extends the battery life by reducing
the quiescent current to 19μA (typ) during light load
operation. For noise-sensitive applications, the device
can be forced into fixed frequency PWM mode by
pulling the MODE pin high. This feature, combined
with high PSRR and AC load regulation performance,
make this device suitable to replace a linear regulator
to obtain better power conversion efficiency.
V_IN
3.15 V .. 4.8 V
C_I
4.7 mF
TPS62690
VIN
EN
L
SW
1.0 mH
FB
GND
MODE
V_OUT
2.85 V @ 500mA
C_O
4.7 mF
Figure 2. Smallest Solution Size Application
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
NanoFree is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
© 2011, Texas Instruments Incorporated