PT6930 Datasheet, PDF (1/7 Pages) Texas Instruments – 5V TO 3.3V/2.5V 25 WATT DUAL OUTPUT INTEGRATED SWITCHING REGULATOR

PT6930 Series
8-A 5V-Input Dual-Output
Integrated Switching Regulator
SLTS062B
(Revised 7/20/2001)
Features
• Dual Outputs:
+3.3V/2.5V
+3.3V/1.5V
+3.3V/1.8V
• Adjustable Output Voltages
• Remote Sense (both outputs)
• Standby Function
• Over-Temperature Protection
• Soft-Start
• Internal Sequencing
• 23-pin Excalibur™ Package
Description
The PT6930 Excalibur™ series of 8-A
dual-output ISRs are designed to power
DSP ICs. Both output voltages are inde-
pendently adjustable with external resistors.
The second output may also be set to an
alternate lower bus voltage with a simple
pin strap. Internal power sequencing of
both outputs, during both power-up and
power-down, meets the requirements of
most DSP chipsets.
Standard Application
STBY
V _IN
4,5,6
C₁
GND
3
22
1
PT6930
7-11 16
23
Vo₂ Sense
Vo₁ Sense
18-21
12-15
+
C₂
+
C₃
C1/C2 =Req’d 330µF electrolytic (See table footnotes)
C3 =Optional 100µF electrolytic
Specifications
Characteristics
(T_a= 25°C unless noted)
Output Current
Symbols
Io₁, Io₂
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
Vo Ripple/Noise
Transient Response
with C₂ = 330µF
Efficiency
Switching Frequency
V_in
∆Vo
Regline
Regload
Vn
ttr
V_os
η
ƒo
Pin-Out Information
Vo₂
Vo₁
GND
Pin Function
1 Vo₁ Sense
2 No Connect
3 STBY
4 V_IN
5 VIN
6 VIN
7 GND
8 GND
9 GND
10 GND
11 GND
12 Vo1
Pin Function
13 Vo₁
14 Vo1
15 Vo1
16 Vo₁ Adjust
17 No Connect
18 Vo2
19 Vo₂
20 Vo2
21 Vo2
22 Vo₂ Sense
23 Vo2 Adjust*
* Note:Vo₁ & Vo₂ Adjust can be pin-strapped to an
alternative lower bus voltage. Consult the voltage
adjustment application note for more information.
Ordering Information
PT6931o = +3.3 Volts
+2.5/1.8 Volts
PT6932o = +3.3 Volts
+1.5/1.2 Volts
PT6933o = +3.3 Volts
+1.8/1.2 Volts
PT Series Suffix (PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
N
Horizontal Through-Hole
A
Horizontal Surface Mount
C
(For dimensions and PC board layout, see
Package Styles 1320 and 1330).
Conditions
T_a = +60°C, 200 LFM, pkg N
T_a = +25°C, natural convection
0.1A ≤ I_o ≤ I_typ
Vin = +5V, Io =Ityp, both outputs
0°C ≤ T_a ≤ +65°C
4.5V ≤ Vin ≤ 5.5V, Io =Ityp
Vin = +5V, 0.1 ≤ Io ≤ Ityp
Vin = +5V, Io =Ityp
Io step between 0.5xItyp and Ityp
V_o over/undershoot
V_in = +5V, I_o =4A total
4.5V ≤ Vin ≤5.5V
0.1A ≤ I_o ≤ I_typ
Vo₁ =3.3V
Vo2 =2.5V
Vo2 =1.8V
Vo₂ =1.5V
Vo1 =1.2V
Vo₁ =3.3V
Vo2 =2.5V
Vo2 =1.8V
Vo₂ =1.5V
Vo1 =1.2V
Vo1
Vo₂
Vo1
Vo₂
Vo1
Vo₂
Vo₁
Vo2
PT6930 SERIES
Min
Typ
Max
0.1 (1)
—
0
—
0
—
0
—
0
—
0.1 (1)
—
0
—
0
—
0
—
0
—
4.5
—
5.5 (2)
2.2 ⁽²⁾
1.75 (2)
1.45 (2)
1.2 ⁽²⁾
6.0 (2)
2.2 ⁽²⁾
1.75 (2)
1.45 (2)
1.2 ⁽²⁾
5.5
Units
A
A
A
V
Vo-0.1 —
Vo+0.1
V
—
—
±7
±7
±17
±13
V
—
—
±17
±33
±4
±10
mV
—
50
—
—
25
—
mV
—
25
—
µSec
—
60
—
—
60
—
mV
—
75
—
%
475
600
725
kHz
(Continued)
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