PT6644 Datasheet, PDF (1/6 Pages) Texas Instruments – 24W 12V Input Positive to Negative Voltage Converter

PT6640 Series
24W 12V Input Positive to Negative
Voltage Converter
SLTS037A
(Revised 6/30/2000)
• Wide Input Voltage Range:
+8V to +25V
• Negative Output:
–2.5V/4A to –15V/1.5A
• Adjustable Output Voltage
• 85% Efficiency
• Remote Sense Capability
The PT6640 series is a positive
input to negative output line of
Integrated Switching Regulators
(ISRs). Designed for general purpose
applications, the PT6640 series deliv-
ers a negative output voltage at up
to 24W. The PT6640 is packaged in
a 14-Pin SIP (Single In-line Package)
and is available in a surface-mount
configuration.
Standard Application
V_IN
4,5,6
PT6640
7,8,9,10
-V_OUT
+
C₁
11,12,13 1
C₂
LOAD
COM
COM
REMOTE SENSE
C₁ = Required 560µF electrolytic
C₂ = Required 330µF electrolytic
Specifications
Characteristics
(T_a = 25°C unless noted)
Output Current
Symbols
Io
Input Voltage Range
Vin
Output Voltage Tolerance
Output Voltage Adjust Range
∆Vo
Voadj
Line Regulation
Load Regulation
Vo Ripple/Noise
Transient Response
with C2 = 330µF
Efficiency
Regline
Regload
Vn
ttr
Vos
η
Pin-Out Information
1 Remote Sense
2
Do Not Connect
3
Do Not Connect
4
+Vin
5
+Vin
6
+Vin
7
–Vout
8
–Vout
9
–V_out
10
–Vout
11 GND
12 GND
13 GND
14
Vout Adjust
Ordering Information
PT6641 = –3.3 Volts
PT6642 = –5.0 Volts
PT6643 = –12.0 Volts
PT6644 = –9.0 Volts
PT6645 = –15.0 Volts
PT6646 = –2.5 Volts
PT Series Suffix (PT1234X)
Case/Pin
Configuration
Heat
Spreader
Vertical Through-Hole
P
Horizontal Through-Hole D
Horizontal Surface Mount E
Pkg Style 400
PT6640
Note: Back surface
of product is
conducting metal
Conditions
Ta = 60°C, 200 LFM, pkg P
Ta = 25°C, natural convection Vo≤ – 5.0V
Vo= – 9.0V
Vo= – 12.0V
Vo= – 15.0V
0.1A ≤ Io ≤ Io max
Vo = –2.5V/3.3V
Vo = – 5.0V
V_o = – 9.0V
Vo = – 12.0V
Vo = – 15.0V
Over Vin range
Ta = -40°C to +65°C
Pin 14 to Vo or ground
Vo = – 2.5V
Vo = – 3.3V
Vo = – 5.0V
Vo = – 9.0V
Vo = –12.0V
V_o = –15.0V
+9V≤Vin≤+Vinmax, Io = Iomax
Vin = +12V, 0.1≤ Io≤Iomax
Vin = +12V, Io = Iomax
Io step between 0.5xIomax and Iomax
Vo over/undershoot
Vin = +12V, Io = 0.5x Iomax Vo = – 2.5V
Vo = – 3.3V
Vo = – 5.0V
Vo = –9.0/12.0V
V_o = –15.0V
Vin = +12V, Io = Iomax
Vo = – 2.5V
V_o = – 3.3V
Vo = – 5.0V
Vo = –9.0/12.0/15.0V
PT6640 SERIES
Min
Typ
Max
Units
0.1
—
(See Note 2)
0.1
—
4.0
0.1
—
0.1
—
2.5
2.0
A
0.1
—
1.5
+8
—
+27
+8
—
+25
+8
—
+21
V
+8
—
+18
+8
—
+15
Vo-0.1 —
Vo+0.1 V
–1.8
—
–2.2
—
–3.0
—
–6.0
—
–9.0
—
–10.0
—
—
±0.5
—
±0.5
—
3.0
—
200
—
100
—
75
—
79
—
83
—
85
—
84
—
74
—
77
—
80
—
84
–4.3
–4.7
–6.5
–10.2
V
–13.6
–17.0
±1.0
%Vo
±1.0
%Vo
—
%Vo
—
µSec
—
mV
—
—
—
%
—
—
—
—
—
%
—
Continued
For technical support and more information, see inside back cover or visit www.ti.com/powertrends