MAX8576 MAXIM [Maxim Integrated Products], MAX8576 Datasheet - Page 11

• Manufacturer Part Number: MAX8576
• Description: 3V to 28V Input, Low-Cost, Hysteretic Synchronous Step-Down Controllers
• Manufacturer: MAXIM [Maxim Integrated Products]

The MAX8576–MAX8579 synchronous PWM buck con-
trollers use Maxim’s proprietary hysteretic voltage-
mode control algorithm to achieve fast transient
response without any loop-compensation requirement.
The controller drives a pair of external n-channel power
MOSFETs to improve efficiency and cost. The
COMPONENTS QTY
C7, C12
C9, C10
C1, C2
C11
C13
Q1
Q2
Q3
C3
C4
C5
C6
C8
D1
R1
R2
R3
R4
R5
R6
R7
R8
L1
External Component List
2
1
1
1
1
2
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
______________________________________________________________________________________
470µF, 35V aluminum electrolytic
capacitors
Sanyo 35MV470WX
10µF, 25V X7R ceramic capacitor
0.01µF, 10V X7R ceramic capacitor
1µF, 35V X7R ceramic capacitor
4.7µF, 6.3V X5R ceramic capacitor
0.1µF, 10V X7R ceramic capacitors
0.027µF, 25V X7R ceramic capacitor
2200µF, 6.3V aluminum electrolytic
capacitors
Rubycon 6.3MBZ2200M10X20
0.01µF, 25V X5R ceramic capacitor
3300pF, 6.3V X5R ceramic capacitor
High-speed diode, 100V, 250mA
Philips BAS316 (SOD-323)
1.8µH, 14A, 3.48m
Panasonic ETQP2H1R8BFA
30V, 12.5m (max), SO-8
International Rectifier IRF7821
30V, 3.7m , SO-8
International Rectifier IRF7832
2N7002 SOT-23
6.04k ±1% resistor
5.11 k ±1% resistor
12.4k ±1% resistor
1k ±5% resistor
20k ±5% resistor
2 ±5% resistor
10 ±5% resistor
4.7 ±5% resistor
Detailed Description
3V to 28V Input, Low-Cost, Hysteretic
MAX8576/MAX8577
DESCRIPTION/VENDOR PART
Synchronous Step-Down Controllers
NUMBER
MAX8576/MAX8577 contain an internal linear low-
dropout (LDO) regulator allowing the controller to oper-
ate from a single 3V to 28V input supply. The
MAX8578/MAX8579 do not contain the internal LDO
and require a separate supply to power the IC when the
input supply is higher than 5.5V. The MAX8576–
MAX8579 output voltages are adjustable from 0.6V to
0.9 x V
COMPONENT QTY
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
R10
R11
R12
R13
Q4
Q5
D2
R9
L2
IN
at loads up to 15A.
External Component List
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
1
1
10µF, 25V X5R ceramic capacitor
1µF, 25V X5R ceramic capacitor
4700pF, 10V X7R ceramic capacitor
4.7µF, 6.3V X5R ceramic capacitor
0.1µF, 10V X7R ceramic capacitor
0.01µF, 25V X7R ceramic capacitor
47µF, 6.3V, ESR = 5m , ceramic
capacitor
Taiyo Yuden JMK432476MM
0.01µF, 25V X5R ceramic capacitor
Optional (47µF, 6.3V, ESR = 5m
ceramic capacitor
Taiyo Yuden JMK432476MM)
1000pF, 25V X5R ceramic capacitor
High-speed diode, 100V, 250mA
Philips BAS316 (SOD-323)
2.2µH, 7.3A, 9.8m
Sumida CDEP104L-2R2
30V, 18m (max), SO-8
International Rectifier IRF7807Z
30V, 9.5m , SO-8
International Rectifier IRF7821
6.04k ±1% resistor
2.49k ±1% resistor
12.4k ±1% resistor
2 ±5% resistor
4.7 ±5% resistor
MAX8578/MAX8579
DESCRIPTION/VENDOR PART
NUMBER
11