TPS62619_10 Datasheet, PDF (1/29 Pages) Texas Instruments – 350-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER IN LOW PROFILE CHIP SCALE PACKAGING (HEIGHT < 0.4mm)

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CSP-6
TPS62619, TPS62612
TPS62615, TPS62616
SLVS936A – NOVEMBER 2009 – REVISED MARCH 2010
350-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER
IN LOW PROFILE CHIP SCALE PACKAGING (HEIGHT < 0.4mm)
Check for Samples: TPS62619, TPS62612, TPS62615, TPS62616
FEATURES
1
•23 90% Efficiency at 6MHz Operation
• 31mA Quiescent Current
• Wide V_IN Range From 2.3V to 5.5V
• 6MHz Regulated Frequency Operation
• Best in Class Load and Line Transient
• ±2% Total DC Voltage Accuracy
• Automatic PFM/PWM Mode Switching
• Low Ripple Light-Load PFM Mode
• >50dB V_IN PSRR (1kHz to 10kHz)
• Internal Soft-Start, 100-ms Start-Up Time
• Integrated Active Power-Down Sequencing
(Optional)
• Three Surface-Mount External Components
Required (One 0603 MLCC Inductor, Two 0402
Ceramic Capacitors)
• Complete Sub 0.4-mm Component Profile
Solution
• Total Solution Size <10 mm²
• Available in a 6-Pin NanoFree™ (CSP)
Ultra-Thin Packaging
APPLICATIONS
• Cell Phones, Smart-Phones
• WLAN, GPS and Bluetooth™ Applications
• DTV Tuner Applications
• DC/DC Micro Modules
l
l
V_BAT
2.9 V .. 5.5 V
C_I
2.2 mF
TPS6261x
VIN
EN
L
SW
0.47 mH
FB
GND
MODE
V_OUT
1.8 V @ 350mA
C_O
4.7 mF
Figure 1. Smallest Solution Size Application
DESCRIPTION
The TPS6261x device is a high-frequency
synchronous step-down dc-dc converter optimized for
battery-powered portable applications. Intended for
low-power applications, the TPS6261x supports up to
350-mA load current, and allows the use of low cost
chip inductor and capacitors.
With a wide input voltage range of 2.3V to 5.5V, the
device supports applications powered by Li-Ion
batteries with extended voltage range. Different fixed
voltage output versions are available from 1.2V to
2.3V.
The TPS6261x operates at a regulated 6-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 31mA (typ) during light load
operation. For low-frequency noise-sensitive
applications, the device can be forced into fixed
frequency PWM mode by pulling the MODE pin high.
These features, combined with high PSRR and AC
load regulation performance, make this device
suitable to replace a linear regulator to obtain better
power conversion efficiency.
The TPS6261x is available in an 6-pin thin chip-scale
package (CSP, 0.4mm max. height).
100
V_I = 3.6 V,
90 _{VO = 1.8 V}
80
70
Efficiency
PFM/PWM Operation
60
50
40
30
Power Loss
PFM/PWM Operation
20
10
0
0.1
1
10
100
I_O - Load Current - mA
200
180
160
140
120
100
80
60
40
20
0
1000
Figure 2. Efficiency vs. Load Current
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
Bluetooth is a trademark of Bluetooth SIG, Inc.
3
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009–2010, Texas Instruments Incorporated