PT5810 Series
20-A 3.3-V Input Adjustable
Integrated Switching Regulator
SLTS174 - JANUARY 2003 - REVISED APRIL 2003
Features
• 3.3 V Input
• On/Off Inhibit Function
• Over-Current Protection
• Thermal Shutdown
• Small Footprint
• 20 A Output Current
• DSP Compatible
• Low-Profile (8 mm)
(0.736 in², Suffix ‘N’)
• >90 % Efficiency
• Output Margin Control ( 5 %)
• Adjustable Output Voltage
• Pre-Bias Startup Capability
• Surface Mount Compatible
• IPC Lead Free 2
Description
Pin-Out Information
Ordering Information
Pin Function
PT5812r = 2.5 Volts
PT5813r = 1.8 Volts
PT5814r = 1.5 Volts
PT5815r = 1.2 Volts
PT5816r = 1.0 Volts
The PT5810 Excalibur™ series of integrated
switching regulators (ISRs) combines outstand-
ing 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 20 A of output current, yet are housed in a
low-profile, 18-pin, package that is almost half
the size of the previous product generation. The
integral copper case construction requires no
heatsink, and offers the advantages of solderabil-
ity and a small footprint (0.736 in² for suffix ‘N’).
Both through-hole and surface mount pin con-
figurations are available.
The PT5810 series operates from a 3.3-V input
bus 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 1.0 VDC.
Other features include external output voltage
adjustment, a 5 % margin control, on/off inhibit,
short circuit protection, thermal shutdown, and a
differential remote sense.
1
2
3
Vo Adjust
Inhibit*
Margin Dn*
Margin Up*
Vin
4
5
6
Vin
7
Vin
8
Sense(–)
GND
GND
GND
GND
GND
Vout
PT Series Suffix
(PT1234x)
9
Case/Pin
Configuration
Order
Suffix
Package
10
11
12
13
14
15
16
17
18
Code
Vertical
Horizontal
SMD
N
A
C
(EPP)
(EPQ)
(EPS)
(Reference the applicable package code draw-
ing for the dimensions and PC board layout)
Vout
Vout
Vout
Sense(+)
* Denotes negative logic:
Open = Normal operation
Ground = Function active
Standard Application
Margin Dn
Margin Up
Vo Adjust
Sense(+)
1
4
3
18
VOUT
5, 6, 7
14–17
VIN
PT5800
+
+
2
9–13
8
CIN
COUT
L
O
A
D
1,000 µF
(Required)
330 µF
(Required)
Sense(–)
Inhibit
GND
Cin = Required 1,000 µF
Cout = Required 330 µF
GND
For technical support and more information, see inside back cover or visit www.ti.com