TPS82690_15 Datasheet, PDF (1/26 Pages) Texas Instruments – 500-mA, HIGH-EFFICIENCY MicroSiP™ STEP-DOWN CONVERTER (PROFILE <1mm)

TPS82690
TPS82695
TPS82697
www.ti.com
SLVSA66B – JUNE 2011 – REVISED FEBRUARY 2012
500-mA, HIGH-EFFICIENCY MicroSiP™ STEP-DOWN CONVERTER (PROFILE <1mm)
Check for Samples: TPS82690, TPS82695, TPS82697
FEATURES
1
•2 Total Solution Size <6.7 mm²
• 95% Efficiency at 4MHz Operation
• 24μA Quiescent Current
• High Duty-Cycle Operation
• Best in Class Load and Line Transient
• ±2% Total DC Voltage Accuracy
• Automatic PFM/PWM Mode Switching
• Low Ripple Light-Load PFM Mode
• Excellent AC Load Regulation
• Internal Soft Start, 130-µs Start-Up Time
• Integrated Active Power-Down Sequencing
(Optional)
• Current Overload and Thermal Shutdown
Protection
• Sub 1-mm Profile Solution
APPLICATIONS
• LDO Replacement
• Cell Phones, Smart-Phones
• PoL Applications
TPS82690SIP
V_BAT
3.25 V .. 4.35 V
C_I
DC/DC Converter
L
VIN
SW
GND
FB
ENABLE
EN
MODE
V_OUT
2.85 V @ 500mA
C_O
MODE
SELECTION
GND
Figure 1. Typical Application
DESCRIPTION
The TPS8269xSIP device is a complete 500mA,
DC/DC step-down power supply intended for
low-power applications. Included in the package are
the switching regulator, inductor and input/output
capacitors. No additional components are required to
finish the design.
The TPS8269xSIP is based on a high-frequency
synchronous step-down dc-dc converter optimized for
battery-powered portable applications. The
MicroSIP™ DC/DC converter 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 24μA (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.
The TPS8269xSIP is packaged in a compact (2.3mm
x 2.9mm) and low profile (1.0mm) BGA package
suitable for automated assembly by standard surface
mount equipment.
100
150
V_I = 3.6 V,
95 ^VO ^{= 2.85 V}
Efficiency
PFM/PWM Operation
135
90
120
85
105
80
90
75
75
70
60
65
Power Loss
45
PFM/PWM Operation
60
30
55
50
0.1
1
10
100
I_O - Load Current - mA
15
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.
MicroSiP, MicroSIP are trademarks of Texas Instruments.
2
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 © 2011–2012, Texas Instruments Incorporated