MIC5011BM Micrel Inc, MIC5011BM Datasheet - Page 6

• Manufacturer Part Number: MIC5011BM
• Description: IC DRIVER MIN PARTS HI/LO 8SOIC
• Manufacturer: Micrel Inc

Specifications of MIC5011BM

• Configuration: High or Low Side
• Input Type: Non-Inverting
• Delay Time: 25µs
• Number Of Configurations: 1
• Number Of Outputs: 1
• Voltage - Supply: 4.75 V ~ 32 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Peak: -
• High Side Voltage - Max (bootstrap): -

MIC5011
Block Diagram
Applications Information
Functional Description (Refer to Block Diagram)
The MIC5011 functions are controlled via a logic block
connected to the input pin 2. When the input is low, all
functions are turned off for low standby current and the
gate of the power MOSFET is also held low through 500Ω
to an N-channel switch. When the input is taken above the
turn-on threshold (3.5V typical), the N-channel switch turns
off and the charge pump is turned on to charge the gate
of the power FET.
MIC5011
250
200
150
100
50
0
0
SUPPLY VOLTAGE (V)
V
5
GATE
Output Current
Charge Pump
10
=V
Input
+
15
V
GATE
VS=V –5V
2
20
Ground
+
=V +5V
4
+
25
LOGIC
V+
30
1
C1 Com C2
8
CHARGE
PUMP
7
6
The charge pump incorporates a 100kHz oscillator and on-
chip pump capacitors capable of charging 1nF to 5V above
supply in 60µs typical. With the addition of 1nF capacitors
at C1 and C2, the turn-on time is reduced to 25µs typical
(see Figure 3). The charge pump is capable of pumping the
gate up to over twice the supply voltage. For this reason, a
zener clamp (12.5V typical) is provided between the gate
pin 5 and source pin 3 to prevent exceeding the V
of the MOSFET at high supplies.
6
500Ω
MIC5011
1.0
0.8
0.6
0.4
0.2
0
12.5V
5 Gate
3 Source
0
SUPPLY VOLTAGE (V)
V
5
GATE
Output Current
Charge Pump
10
=V
+
15
V
GATE
VS=V –5V
C2=1 nF
20
=V +5V
+
+
25
July 2005
Micrel, Inc.
30
GS
rating