TLE6389 Datasheet, PDF (1/23 Pages) Infineon Technologies AG – Step-Down DC/DC Controller

Step-Down DC/DC Controller
TLE 6389
Target Datasheet
Features
• Operation from 5V to 60V Input Voltage
• 100% Maximum Duty Cycle
• Efficiency >90%
• Output Current up to 3A
• Less than 100µA Quiescent Current
P-DSO-14-3, -4, -9, -11
• 2µA Max Shutdown Current
• Up to 350kHz Switching Frequency
• Adjustable and Fixed 5V and
3.3V Output Voltage versions
V_IN
• 3% output voltage accuracy
R_SENSE=
0.05

M1
L₁ = 47 µH
V_OUT
I_OUT
(PWM Mode)
• Current-Mode Control Scheme
• On Chip Low Battery Detector
C_IN1 =
100 µF
C_BDS=
220 nF
C_OUT =
D1
100 µF
• Ambient operation range
-40°C to 125°C
R_SI1=
400k

R_SI2=
100k

C_IN2 =
220nF
11
14
12
2
13 ^BDS
VS
CS
GDRV
FB
3
VOUT
9
7 _SI
TLE6389G50-1
SO
10
RO
M1: Infineon SPD09P06PL
D1: Motorola MBRD360
L1: Coilcraft DO3340P-473
Cin1: TBD
Cout: Low ESR Tantalum
SI_GND SI_ENABLE SYNC GND RD
6
1
ON OFF
5
4
8
C_RD =100nF
Type
TLE 6389 GV
TLE 6389 G50
TLE 6389 G50-1
TLE 6389 G33
TLE 6389 G33-1
Ordering Code
on request
on request
on request
on request
on request
Package
P-DSO-14
P-DSO-14
P-DSO-14
P-DSO-14
P-DSO-14
Description
adjustable
5V, Device Enable
5V, SI GND, SI Enable
3.3V, Device Enable
3.3V, SI GND, SI Enable
Functional description
The TLE6389 step-down DC-DC switching controllers provide high efficiency over loads
ranging from 1mA up to 3A. A unique PWM/PFM control scheme operates with up to a
100% duty cycle, resulting in very low dropout voltage. This control scheme eliminates
minimum load requirements and reduces the supply current under light loads to 100µA.
These step-down controllers drive an external P-channel MOSFET, allowing design
flexibility for applications up to 3A. A high switching frequency (up to 350kHz) and
Target Datasheet Rev. 1.7
1
2001-09-17