MAX786CAI+T Maxim Integrated Products, MAX786CAI+T Datasheet - Page 7

• Manufacturer Part Number: MAX786CAI+T
• Description: IC CNTRLR PWR SUP DL 28SSOP
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX786CAI+T

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 3.3V, 5V
• Current - Output: 3A
• Frequency - Switching: 200kHz, 300kHz
• Voltage - Input: 5.5 ~ 30 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Power - Output: 762mW
• Output Voltage: 3.3 V, 3.45 V, 3.6 V
• Input Voltage: 5.5 V to 30 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

_______________________________________________________________________Pin Description
PIN
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
NAME
PGND
SYNC
SHDN
BST5
BST3
GND
CS3
ON3
ON5
DH5
DH3
CS5
SS3
REF
SS5
LX5
DL5
FB5
DL3
LX3
FB3
VH
Q2
Q1
D1
D2
VL
V+
_______________________________________________________________________________________
Current-sense input for +3.3V; +100mV = current limit level referenced to FB3.
Soft-start input for +3.3V. Ramp time to full current limit is 1ms/nF of capacitance to GND.
ON/OFF control input disables the +3.3V PWM. Tie directly to VL for automatic start-up.
#1 level-translator/comparator noninverting input, threshold = +1.650V. Controls Q1. Tie to GND if unused.
#2 level-translator/comparator noninverting input (see D1)
External positive supply-voltage input for the level translators/comparators
#2 level-translator/comparator output. Sources 20µA from VH when D2 is high. Sinks 500µA to GND
when D2 is low, even with VH = 0V.
#1 level translator/comparator output (see Q2)
Low-current analog ground
3.3V reference output. Sources up to 5mA for external loads. Bypass to GND with 1µF/mA of load or
0.22µF minimum.
Oscillator control/synchronization input. Connect to VL or GND for 200kHz; connect to REF for
300kHz. For external clock synchronization in the 240kHz to 350kHz range, a high-to-low transition
causes a new cycle to start.
Shutdown control input, active low. Tie to VL for automatic start-up. The 5V VL supply stays active in
shutdown, but all other circuitry is disabled. Do not force SHDN higher than VL + 0.3V.
ON/OFF control input disables the +5V PWM supply. Tie to VL for automatic start-up.
Soft-start control input for +5V. Ramp time to full current limit is 1ms/nF of capacitance to GND.
Current-sense input for +5V; +100mV = current-limit level referenced to FB5.
Gate-drive output for the +5V high-side MOSFET
Inductor connection for the +5V supply
Boost capacitor connection for the +5V supply (0.1µF)
Gate-drive output for the +5V low-side MOSFET
Power ground
Feedback and current-sense input for the +5V PWM
5V logic supply voltage for internal circuitry. VL is always on and can source 5mA for external loads.
Supply voltage input from battery, 5.5V to 30V
Gate-drive output for the +3.3V low-side MOSFET
Boost capacitor connection for the +3.3V supply (0.1µF)
Inductor connection for the +3.3V supply
Gate-drive output for the +3.3V high-side MOSFET
Feedback and current-sense input for the +5V PWM
Controller for Notebook Computers
Dual-Output Power-Supply
FUNCTION
7