TPS62674 Datasheet, PDF (1/28 Pages) Texas Instruments – 500-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER IN LOW PROFILE CHIP SCALE PACKAGING

CSP-6
TPS6267x
www.ti.com
SLVS952 – APRIL 2010
500-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER
IN LOW PROFILE CHIP SCALE PACKAGING (HEIGHT < 0.4mm)
Check for Samples: TPS6267x
FEATURES
1
•23 92% Efficiency at 6MHz Operation
• 17mA Quiescent Current
• Wide V_IN Range From 2.3V to 4.8V
• 6MHz Regulated Frequency Operation
• Spread Spectrum, PWM Frequency Dithering
• Best in Class Load and Line Transient
• ±2% Total DC Voltage Accuracy
• Low Ripple Light-Load PFM Mode
• >50dB V_IN PSRR (1kHz to 10kHz)
• Simple Logic Enable Inputs
• Supports External Clock Presence Detect
Enable Input
• Three Surface-Mount External Components
Required (One 0603 MLCC Inductor, Two 0402
Ceramic Capacitors)
• Complete Sub 0.33-mm Component Profile
Solution
• Total Solution Size <10 mm²
• Available in a 6-Pin NanoFree™ (CSP)
Ultra-Thin Packaging, 0,4mm Max. Height
100
200
V_I = 3.6 V,
90 V_O = 1.8 V
180
80
160
70
140
60
120
50
100
40
80
30
60
20
40
10
20
0
0
0.1
1
10
100
1000
I_O - Load Current - mA
Figure 1. Efficiency vs. Load Current
APPLICATIONS
• Cell Phones, Smart-Phones
• Camera Module Embedded Power
• Digital TV, WLAN, GPS and Bluetooth™
Applications
• DC/DC Micro Modules
DESCRIPTION
The TPS6267x device is a high-frequency
synchronous step-down dc-dc converter optimized for
battery-powered portable applications. Intended for
low-power applications, the TPS6267x supports up to
500-mA load current, and allows the use of low cost
chip inductor and capacitors.
With a wide input voltage range of 2.3V to 4.8V, the
device supports applications powered by Li-Ion
batteries with extended voltage range. Different fixed
voltage output versions are available from 1.0V to
2.3V.
The TPS6267x 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 17mA (typ) during light load
operation. For noise-sensitive applications, the device
has PWM spread spectrum capability providing a
lower noise regulated output, as well as low noise at
the input. 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.
V_BAT
2.3 V .. 4.8 V
C_I
2.2 mF
TPS62671
VIN
EN
L
SW
0.47 mH
FB
GND
MODE
V_OUT
1.8 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
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 © 2010, Texas Instruments Incorporated