Datasheet

   
     
SLVS324A − JULY 2001 REVISED NOVEMBER 2004
2
WWW.TI.COM
AVAILABLE OPTIONS
PART NUMBER
†
MARKING DBV
PACKAGE
TYPICAL FLYING CAPACITOR
[µF]
FEATURE
TPS60400DBV PFKI 1
Variable switching frequency
50 kHz−250 kHz
TPS60401DBV PFLI 10 Fixed frequency 20 kHz
TPS60402DBV PFMI 3.3 Fixed frequency 50 kHz
TPS60403DBV PFNI 1 Fixed frequency 250 kHz
†
The DBV package is available taped and reeled. Add R suffix to device type (e.g. TPS60400DBVR) to order quantities of
3000 devices per reel. Add T suffix to device type (e.g. TPS60400DBVT) to order quantities of 250 devices per reel.
TPS60400 functional block diagram
Start
FF
R
S
Q
V
I
− VCFLY+ < 0.5 V
V
I
MEAS
V
I
< 1 V
V
I
V
O
> V
be
V
O
MEAS
V
O
OSC
OSC
CHG
50 kHz
V
O
> −1 V
V
I
/ V
O
MEAS
V
I
V
O
VCO_CONT
V
O
< −V
I
− V
be
Phase
Generator
DC_ Startup
C
(fly)
+
Q3
Q2
Q1
Q4
V
I
V
O
GND
Q5
Q
Q
B
DC_ Startup
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME NO.
I/O
DESCRIPTION
C
FLY+
5 Positive terminal of the flying capacitor C
(fly)
C
FLY−
3 Negative terminal of the flying capacitor C
(fly)
GND 4 Ground
IN 2 I Supply input. Connect to an input supply in the 1.6-V to 5.5-V range. Bypass IN to GND with a capacitor that has the
same value as the flying capacitor.
OUT 1 O Power output with V
O
= −V
I
Bypass OUT to GND with the output filter capacitor C
O
.