MAX8757 Maxim Integrated Products, MAX8757 Datasheet
MAX8757
Manufacturer Part Number
MAX8757
Description
(MAX8716 - MAX8757) Dual Power-Supply Controllers
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX8757.pdf
(30 pages)
The MAX8716/MAX8717/MAX8757 are dual, step-
down, interleaved, fixed-frequency, switch-mode
power-supply (SMPS) controllers with synchronous rec-
tification. They are intended for main (5V/3.3V) and I/O
power generation in battery-powered systems.
Fixed-frequency operation with optimal interleaving
minimizes input ripple current from the lowest input volt-
ages up to the 26V maximum input. Optimal 40/60 inter-
leaving allows the input voltage to go down to 8.3V
before duty-cycle overlap occurs, compared to 180°
out-of-phase regulators where the duty-cycle overlap
occurs when the input drops below 10V.
Accurate output current limit is achieved using a sense
resistor. Alternatively, power dissipation can be
reduced using lossless inductor current sensing.
Independent ON/OFF controls and power-good signals
allow flexible power sequencing. Soft-start reduces
inrush current, while soft-stop gradually ramps the out-
put voltage down preventing negative voltage dips.
A low-noise mode maintains high light-load efficiency
while keeping the switching frequency out of the audi-
ble range.
The MAX8716 is available in a 24-pin thin QFN pack-
age, and the MAX8717/MAX8757 are available in a 28-
pin thin QFN package.
19-3569; Rev 1; 6/05
Dual Mode is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Interleaved High-Efficiency, Dual Power-Supply
2 to 4 Li+ Cell Battery-Powered Devices
Notebook and Subnotebook Computers
PDAs and Mobile Communicators
Main or I/O Power Supplies
PGOOD1
TOP VIEW
CSH1
CSL1
BST1
________________________________________________________________ Maxim Integrated Products
DH1
FB1
19
20
21
22
23
24
General Description
18
1
Controllers for Notebook Computers
17
2
MAX8716ETG
16
TQFN
3
15
4
Applications
14
5
13
6
12
11
10
9
8
7
DH2
BST2
CSH2
CSL2
FB2
PGOOD2
♦ Fixed 200kHz, 300kHz, or 500kHz Switching
♦ No Current-Sense Resistor Required
♦ 40/60 Optimal Interleaving
♦ Reduced Input-Capacitor Requirement
♦ 3.3V and 5V fixed or 1.0V to 5.5V Adjustable
♦ 4V to 26V Input Range
♦ Independently Selectable PWM, Skip, and Low-
♦ Soft-Start and Soft-Stop
♦ 2V Precision Reference with 0.75% Accuracy
♦ Independent Power-Good Outputs
+Denotes lead-free package.
MAX8716ETG
MAX8716ETG+
MAX8717ETI
MAX8717ETI+
MAX8757ETI+
TOP VIEW
Frequency
Outputs (Dual Mode™)
Noise Mode Operation
PART
22
23
24
25
26
27
28
21
1
20
2
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
MAX8757ETI+
19
MAX8717ETI
3
TQFN
18
4
Ordering Information
17
5
Pin Configurations
16
6
15
7
PIN-PACKAGE
24 Thin QFN 4mm x 4mm
24 Thin QFN 4mm x 4mm
28 Thin QFN 5mm x 5mm
28 Thin QFN 5mm x 5mm
28 Thin QFN 5mm x 5mm
14
13
12
11
10
9
8
Features
1
Related parts for MAX8757
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
EVALUATION KIT/2.4GHZ TO 2.5GHZ 802.11G/B RF TRANSCEIVER WITH INTEGRATED PA
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
QFN/E/DUAL PCIE/SATA HIGH SPEED SWITCH WITH INTEGRATED BIAS RESISTOR
Manufacturer:
Maxim Integrated Products
Datasheet: