L5994A STMicroelectronics, L5994A Datasheet - Page 20

• Manufacturer Part Number: L5994A
• Description: IC CTRLR PS ADJ TRPL-OUT 32-TQFP
• Manufacturer: STMicroelectronics

Specifications of L5994A

• Pwm Type: Current Mode
• Number Of Outputs: 3
• Frequency - Max: 345kHz
• Duty Cycle: 96%
• Voltage - Supply: 4.75 V ~ 25 V
• Buck: Yes
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 140°C
• Package / Case: 32-TQFP, 32-VQFP
• Frequency-max: 345kHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5340; L5994A

L5994 - L5994A
L5994 Evaluation Kit
The L5994 Evaluation kit is a fully assembled and tested demonstration board that implements a standard ap-
plication circuit, configured according to the following specifications:
Input Voltage Range: 5V to 25V;
3.3V Output: Iout3 = 3A;
5.1V Output: Iout5 = 3A;
12V Output: Iout12 = 50mA;
Switching frequency: f
Figure 7. L5994 Evaluation kit
20/26
PWROK2
PWROK1
NOSKIP
VOUT1
+5VIN
7) Use heavy copper traces: this will reduce their resistance, increasing overall efficiency and will improve
GND
GND
GND
VIN
R19
side and power traces on the other side.
their heat-sinking ability.
R5
R6
C18
R33
C6
C26
C10
C11
R34
C9
C20
Vin2
SW
C1
R15
R14
C30
R1
= 300kHz.
R2
C28
C2
R13
S2
L1
D6
R12
C7
D1
S1
R17
R11
S3
C16
R10
Q1
Q2
S4
G2
G1
D3
R9
H1STRAP
PWROK2
PWROK1
H1GATE
R1GATE
NOSKIP
COMP1
H1SRC
PREG5
V1SNS
RUN2
RUN1
OSC
R21
R22
I1SNS
V5SW
1
32
31
30
29
6
5
4
7
23
10
15
16
14
11
2
VIN
L5994
R16
13
SGND
3
24
25
27
28
21
20
18
22
17
12
SREG5
26
19
8
9
H2STRAP
H2GATE
H2SRC
R2GATE
PGND
I2SNS
VDRLIN
V2SNS
COMP2
VFBLIN
SOFT1
SOFT2
CRST
VREF
R23
R24
D4
C17
Q4
Q3
C21
D2
C23
C8
L2
C22
C3
C31
C19
R3
R4
C24
C4
R7
R26
C13
C14
C15
R8
R25
D98IN866B
R28
R20
C27
VOUT3
LIN
VOUT2
GND
Vin2