Document
PT6470 Series
14-A 3.3-V Input Adjustable Integrated Switching Regulator
SLTS180A - JANUARY 2003 - REVISED JUNE 2003
Features
• 3.3 V Input • 14 A Output Current • Low-Profile (8mm) • DSP Compatible • High Efficiency (Up to 95%) • Adjustable Output Voltage • On/Off Inhibit Function • Pre-Bias Start-up Capability
• Over-Current Protection • Output Remote Sense • Optional Output Capacitor • Small Footprint
(0.64 in², Suffix ‘N’)
• Surface Mount Compatible • IPC Lead Free 2
Description
The PT6470 Excalibur™ series of integrated switching regulators (ISRs) combines outstanding power density with a comprehensive list of features. They are an ideal choice for applications where board space is a premium and performance cannot be compromised. These modules provide a full 14 A of output current, yet are housed in a low-profile, 12-pin, package that is almost half the size of the previous generation of products. The integral copper case construction requires no heatsink, and offers the advantages of solderability and a small footprint (0.64 in² for suffix ‘N’). Both through-hole and surface mount pin configurations are available.
The PT6470 series operates from a 3.3-V input to provide a convenient point-of-load power source for the industry’s latest high-performance DSPs and microprocessors. The series includes output voltage options as low as 1.0V DC.
Other features include external output voltage adjustment, on/off inhibit, pre-bias startup, short circuit protection, and an output remote sense.
Ordering Information
PT6472H = 2.5 Volts PT6473H = 2.0 Volts PT6474H = 1.8 Volts PT6475H = 1.5 Volts PT6476H = 1.2 Volts PT6477H = 1.0 Volts
PT Series Suffix (PT1234x )
Case/Pin Configuration
Order Suffix
Package Code
Vertical Horizontal SMD
N (EPH) A (EPJ) C (EPK)
(Reference the applicable package code drawing for the dimensions and PC board layout)
Standard Application
VIN
CIN 470 µF (Required) Inhibit
GND
++
12 11
2–4 PT6470 9–10
1 5–8
COUT 330 µF (Optional)
Vo Adjust +VSENSE
VOUT
L O A D
GND
Pin-Out Information
Pin Function 1 Inhibit* 2 Vin 3 Vin 4 Vin 5 GND 6 GND 7 GND 8 GND 9 Vout 10 Vout 11 +Vsense 12 Vo Adjust * Denotes negative logic: Open = Output enabled Ground = Output disabled
Cin = Required 470 µF Cout = Optional 330 µF
For technical support and more information, see inside back cover or visit www.ti.com
PT6470 Series
14-A 3.3-V Input Adjustable Integrated Switching Regulator
SLTS180A - JANUARY 2003 - REVISED JUNE 2003
Specifications (Unless otherwise stated, Ta =25 °C, Vin =3.3 V, Cin =470 µF, Cout =0 µF, and Io =Iomax)
Characteristics
Symbols
Conditions
PT6470 SERIES Min Typ Max
Units
Output Current Input Voltage Range Set-Point Voltage Tolerance Temperature Variation Line Regulation Load Regulation Total Output Variation
Efficiency
Vo Ripple (pk-pk) Transient Response
Over-Current Threshold Output Voltage Adjust Switching Frequency Inhibit Control (pin1) Input High Voltage Input Low Voltage Input Low Current Inhibit In.