MIC2811_08 Datasheet, PDF (4/17 Pages) Micrel Semiconductor – Digital Power Management IC 2MHz, 600mA DC/DC with Triple 300mA LDOs

Micrel, Inc.
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (DV_IN, V_IN, V_IN1, V_IN2) ................... 0V to +6V
Enable Voltage (V_EN, V_EN1, V_EN2, V_EN3) ................ 0V to +6V
Power Dissipation ................................. Internally Limited⁽³⁾
Lead Temperature (Soldering, 10 sec.) ..................... 260°C
Storage Temperature (T_S)...................–65°C ≤ T_J ≤ +150°C
ESD Rating⁽⁴⁾ ................................................................. 2kV
MIC2811/2821
Operating Ratings⁽²⁾
Supply voltage (DV_IN, V_IN) ......................... +2.7V to +5.5V
Supply voltage (V_IN1, V_IN2) ............................+1.65V to V_IN
Enable Input Voltage (V_EN, V_EN1, V_EN2, V_EN3) ...... 0V to V_IN
Junction Temperature Range (T_J) .........–40°C to +125°C
Package Thermal Resistance
3mm x 3mm MLF-16 (θ_JA) .............................56°C/W
Electrical Characteristics⁽⁵⁾
DV_IN = V_IN = V_IN1 = V_IN2 = V_OUTMAX + 1V, L = 2.2µH; C_OUTDC/DC = 2.2µF, C_OUT1 = C_OUT2 = C_OUT3 = 2.2µF; I_OUTDC/DC = 20mA;
I_OUTLDO1 = I_OUTLDO2 = I_OUTLDO2 = 100µA; T_J = 25°C, bold values indicate –40°C < T_J < +125°C; unless noted.
Parameter
Conditions
Min Typ Max
UVLO Threshold
Rising input voltage during turn-on (DVIN & VIN Only)
2.45 2.55 2.65
UVLO Hysteresis
100
Ground Pin Current
V_FB = 1.1*V_FBNOM (not switching);
800 1100
Units
V
mV
µA
Ground Pin Current in
Shutdown
Over-temperature Shutdown
Over-temperature Shutdown
Hysteresis
Enable Input Voltage
Enable Input Current
LDO2 or LDO1 Only (V_EN = V_EN3 = GND)
LDO3 only (V_EN = V_EN1 = V_EN2 = GND / MIC2821 only)
All 3 LDOs
All EN = 0V
Logic Low
Logic High
55
85
µA
95
µA
40
µA
120
µA
0.2
5
µA
160
°C
23
°C
0.2
V
1.1
V
0.1
1
µA
Electrical Characteristics - DC/DC Converter
DV_IN = V_IN = V_EN = V_OUTDC/DC + 1V, L = 2.2µH; C_OUTDC/DC = 2.2µF, C_OUT1 = C_OUT2 = C_OUT3 = 2.2µF; I_OUTDC/DC = 20mA; T_J = 25°C, bold
values indicate –40°C to + 125°C; unless noted.
Parameter
Conditions
Min Typ Max Units
Output Voltage Accuracy
Fixed Output Voltages
-2
+2
%
-3
+3
%
Current Limit in PWM Mode
FB pin input current (ADJ only)
V_FB = 0.9*V_FBNOM
0.75 1.2
1.8
A
1
nA
Output Voltage Line Regulation
Output Voltage Load Regulation
Maximum Duty Cycle
V_OUT > 2.4V; V_IN = V_OUT + 300mV to 5.5V, I_LOAD= 20mA
V_OUT < 2.4V; V_IN = 2.7V to 5.5V, I_LOAD= 20mA
20mA < I_LOAD < 300mA
V_FB ≤ 0.4V
0.2
%/V
%/V
0.2
1.5
%
100
%
Switch ON-Resistance
PMOS (0.7*V_FBNOM)
NMOS (1.1*V_FBNOM)
0.5
Ω
0.55
Ω
Oscillator Frequency
Turn-on Time
Turn-on Time (DC/DC)
I_LOAD = 300mA; C_BYP = 0.1µF
1.8
2
2.2
MHz
83
350
µs
April 2008
4
M9999-042208-A