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MCP1827S
Technical data
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MICROCHIP MCP1827, MCP1827S Technical data

MCP1827/MCP1827S
Fixed/Adjustable 3-LD DDPAK
5-LD DDPAK
3-LD TO-220
5-LD TO-220
12345
12345
123
123
PWRGD
SHDN
V
IN
GND(TAB)
V
OUT
ADJ
SHDN
V
IN
GND(TAB)
V
OUT
V
IN
GND(TAB)
V
OUT
V
IN
GND(TAB)
V
OUT
MCP1827
MCP1827
MCP1827S
MCP1827S
1.5A, Low Voltage, Low Quiescent Current LDO Regulator
Features
• 1.5A Output Current Capability
• Input Operating Voltage Range: 2.3V to 6.0V
• Adjustable Output Voltage Range: 0.8V to 5.0V (MCP1827 only)
• Standard Fixed Output Voltages:
• Other Fixed Output Voltage Options Available Upon Request
• Low Dropout Voltage: 330 mV Typical at 1.5A
• Typical Output Voltage Tolerance: 0.5%
• Stable with 1.0 µF Ceramic Output Capacitor
• Fast response to Load Transients
• Low Supply Current: 120 µA (typ)
• Low Shutdown Supply Current: 0.1 µA (typ) (MCP1827 only)
• Fixed Delay on Power Good Output (MCP1827 only)
• Short Circuit Current Limiting and Overtemperature Protection
• 5-Lead Plastic DDPAK, 5-Lead TO-220 Package Options (MCP1827)
• 3-Lead Plastic DDPAK, 3-Lead TO-220 Package Options (MCP1827S)
Applications
• High-Speed Driver Chipset Power
• Networking Backplane Cards
• Notebook Computers
• Network Interface Cards
• Palmtop Computers
• 2.5V to 1.XV Regulators
Description
The MCP1827/MCP1827S is a 1.5A Low Dropout (LDO) linear regulator that provides high current and low output voltages. The MCP1827 comes in a fixed or adjustable output voltage version, with an output voltage range of 0.8V to 5.0V. The 1.5A output current capability, combined with the low output voltage capability, make the MCP1827 a good choice for new sub-1.8V output voltage LDO applications that have high current demands. The MCP1827S is a 3-pin fixed voltage version. The MCP1827/MCP1827S is based upon the MCP1727 LDO device.
The MCP1827/MCP1827S is stable using ceramic output capacitors that inherently provide lower output noise and reduce the size and cost of the entire regulator solution. Only 1 µF of output capacitance is needed to stabilize the LDO.
Using CMOS construction, the quiescent current consumed by the MCP1827/MCP1827S is typically less than 120 µA over the entire input voltage range, making it attractive for portable computing applications that demand high output current. The MCP1827 versions have a Shutdown (S
HDN) pin. When shut
down, the quiescent current is reduced to less than
0.1 µA. On the MCP1827 fixed output versions the
scaled-down output voltage is internally monitored and a power good (PWRGD) output is provided when the output is within 92% of regulation (typical). The PWRGD delay is internally fixed at 200 µs (typical).
The overtemperature and short circuit current-limiting provide additional protection for the LDO during system fault conditions.
Package Types
© 2007 Microchip Technology Inc. DS22001C-page 1
MCP1827/MCP1827S
MCP1827 Adjustable Output Voltage
MCP1827 Fixed Output Voltage
V
OUT
= 1.8V @ 1A
VIN = 2.3V to 2.8V
On
Off
1µF
100 kΩ
4.7 µF
C
1
C
2
R
1
SHDN
V
IN
GND
V
OUT
PWRGD
20 kΩ
R
2
VAD J
12345
V
OUT
= 1.2V @ 1A
VIN = 2.3V to 2.8V
On
Off
1µF
40 kΩ
4.7 µF
C
1
C
2
R
1
SHDN
V
IN
GND
V
OUT
12345
Typical Application
DS22001C-page 2 © 2007 Microchip Technology Inc.
Functional Block Diagram - Adjustable Output
EA
+
–
V
OUT
PMOS
R
f
C
f
I
SNS
Overtemperature
V
REF
Comp
92% of V
REF
T
DELAY
V
IN
Driver w/limit
and SHDN
GND
Soft-Start
ADJ
Undervoltage
Lock Out
V
IN
Reference
SHDN
SHDN
SHDN
Sensing
(UVLO)
MCP1827/MCP1827S
© 2007 Microchip Technology Inc. DS22001C-page 3
MCP1827/MCP1827S
EA
+
–
V
OUT
PMOS
R
f
C
f
I
SNS
V
REF
Comp
92% of V
REF
T
DELAY
V
IN
GND
Soft-Start
Sense
V
IN
Reference
SHDN
SHDN
SHDN
PWRGD
Overtemperature
Driver w/limit
and SHDN
Undervoltage
Lock Out
Sensing
(UVLO)
Functional Block Diagram - Fixed Output (5 pin)
DS22001C-page 4 © 2007 Microchip Technology Inc.
Functional Block Diagram - Fixed Output (3-Pin)
EA
+
–
V
OUT
PMOS
R
f
C
f
I
SNS
V
REF
Comp
92% of V
REF
T
DELAY
V
IN
GND
Soft-Start
Sense
V
IN
Reference
SHDN
SHDN
SHDN
Overtemperature
Driver w/limit
and SHDN
Undervoltage
Lock Out
Sensing
(UVLO)
MCP1827/MCP1827S
© 2007 Microchip Technology Inc. DS22001C-page 5
MCP1827/MCP1827S

1.0 ELECTRICAL CHARACTERISTICS

† Notice: Stresses above those listed under “Maximum Rat-
ings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the
Absolute Maximum Ratings †
VIN....................................................................................6.5V
Maximum Voltage on Any Pin.. (GND – 0.3V) to (V
DD
+ 0.3)V
operational listings of this specification is not implied. Expo­sure to maximum rating conditions for extended periods may affect device reliability.
Maximum Power Dissipation......... Internally-Limited (Note 6)
Output Short Circuit Duration ................................ Continuous
Storage temperature .....................................-65°C to +150°C
Maximum Junction Temperature, T ESD protection on all pins (HBM/MM)
...........................+150°C
J
........... ≥ 2kV; ≥ 200V
AC/DC CHARACTERISTICS
Electrical Specifications: Unless otherwise noted, V
I
= 1 mA, CIN = C
OUT
-40°C to +125°C
= 4.7 µF (X7R Ceramic), TA = +25°C. Boldface type applies for junction temperatures, TJ (Note 7) of
OUT
Parameters Sym Min Typ Max Units Conditions
Input Operating Voltage V Input Quiescent Current I
Input Quiescent Current for SHDN
Mode
Maximum Output Current I
Line Regulation
Load Regulation
Output Short Circuit Current I
I
ΔV
(V
OUT
ΔV
OUT/VOUT
OUT_SC
IN
q
SHDN
OUT
OUT
x ΔVIN)
/
Adjust Pin Characteristics (Adjustable Output Only)
Adjust Pin Reference Voltage V
Adjust Pin Leakage Current I Adjust Temperature Coefficient TCV
ADJ
ADJ
OUT
Fixed-Output Characteristics (Fixed Output Only) Note 1: The minimum V
must meet two conditions: V
IN
2: VR is the nominal regulator output voltage for the fixed cases. VR = 1.2V, 1.8V, etc. VR is the desired set point output
voltage for the adjustable cases. V
3: TCV
= (V
OUT
OUT-HIGH
temperature range. V
– V
OUT-LOW
R
) *106 / (VR * ΔTemperature). V
OUT-LOW
is the lowest voltage measured over the temperature range.
4: Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is
tested over a load range from 1 mA to the maximum specified output current.
5: Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its
nominal value that was measured with an input voltage of V
6: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction
temperature and the thermal resistance from junction to air. (i.e., T dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained junction temperatures above 150°C can impact device reliability.
7: The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the
desired junction temperature. The test time is small enough such that the rise in the junction temperature over the ambient temperature is not significant.
IN
= V
OUT(MAX)
+ V
DROPOUT(MAX)
Note 1, VR=1.8V for Adjustable Output,
2.3 6.0 V Note 1 — 120 220 µA IL = 0 mA, VIN = Note 1,
V
= 0.8V to 5.0V
OUT
—0.1 3 µA SHDN = GND
1.5 —— AV
= 2.3V to 6.0V
IN
V
= 0.8V to 5.0V, Note 1
R
—0.050.16 %/V (Note 1)
-1.0 ±0.5 1.0 %I
—2.2— AV
= 1 mA to 1.5A,
OUT
V
= Note 1, (Note 4)
IN
= Note 1, R
IN
Peak Current
0.402 0.410 0.418 VVIN = 2.3V to VIN=6.0V,
I
= 1 mA
OUT
-10 ±0.01 +10 nA VIN = 6.0V, V —40—ppm/°CNote 3
= V
≥ 2.3V and V
IN
((R1/R2)+1). Figure 4-1.
ADJ *
≥ V
IN
OUT(MAX)
OUT-HIGH
IN = VOUTMAX
, TJ, θJA). Exceeding the maximum allowable power
A
+ V
DROPOUT(MAX).
is the highest voltage measured over the
+ V
DROPOUT(MAX)
.
≤ V
IN
≤ 6V
LOAD
=0Vto6V
ADJ
<0.1Ω,
DS22001C-page 6 © 2007 Microchip Technology Inc.
MCP1827/MCP1827S
AC/DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise noted, V
I
= 1 mA, CIN = C
OUT
-40°C to +125°C
= 4.7 µF (X7R Ceramic), TA = +25°C. Boldface type applies for junction temperatures, TJ (Note 7) of
OUT
Parameters Sym Min Typ Max Units Conditions
Voltage Regulation V
OUT
Dropout Characteristics
Dropout Voltage V
IN-VOUT
Power Good Characteristics
PWRGD Input Voltage Operat-
V
PWRGD_VIN
ing Range
PWRGD Threshold Voltage (Referenced to V
OUT
)
PWRGD Threshold Hysteresis V PWRGD Output Voltage Low V
PWRGD Leakage P PWRGD Time Delay T
Detect Threshold to PWRGD
V
PWRGD_TH
PWRGD_HYS
PWRGD_L
WRGD_LK
PG
T
VDET-PWRGD
Active Time Delay
Shutdown Input
Logic High Input V Logic Low Input V
Input Leakage Current SHDN
SHDN
SHDN-HIGH
SHDN-LOW
ILK
AC Performance
Output Delay From SHDN
Output Noise e
Note 1: The minimum V
must meet two conditions: V
IN
T
OR
N
2: VR is the nominal regulator output voltage for the fixed cases. VR = 1.2V, 1.8V, etc. VR is the desired set point output
voltage for the adjustable cases. V
3: TCV
= (V
OUT
temperature range. V
OUT-HIGH
– V
OUT-LOW
R
) *106 / (VR * ΔTemperature). V
OUT-LOW
is the lowest voltage measured over the temperature range.
4: Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is
tested over a load range from 1 mA to the maximum specified output current.
5: Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its
nominal value that was measured with an input voltage of V
6: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction
temperature and the thermal resistance from junction to air. (i.e., T dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained junction temperatures above 150°C can impact device reliability.
7: The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the
desired junction temperature. The test time is small enough such that the rise in the junction temperature over the ambient temperature is not significant.
= V
IN
OUT(MAX)
VR - 2.5% V
+ V
DROPOUT(MAX)
R
±0.5%
Note 1, VR=1.8V for Adjustable Output,
+ 2.5% V Note 2
V
R
— 330 600 mV Note 5, I
V
IN(MIN)
1.0 — 6.0 V TA = +25°C
1.2 — 6.0 T
= -40°C to +125°C
A
For V
%V
89 92 95 V 90 92 94 V
1.0 2.0 3.0 %V
—0.20.4 VI
—1—nAV
OUT
OUT
Falling Edge
OUT
OUT
PWRGD SINK
ADJ = 0V
PWRGD
— 200 — µs Rising Edge
R
PULLUP
— 200 — µs V
ADJ
20 mV to V
45 %VINVIN = 2.3V to 6.0V
15 %VINVIN = 2.3V to 6.0V
-0.1 ±0.001 +0.1 µA VIN= 6V, SHDN =VIN,
SHDN
100 µs SHDN = GND to VIN
V
OUT
—2.0—µV/√Hz I
OUT
= 10 µF (X7R Ceramic), V
2.5V
= V
≥ 2.3V and V
IN
((R1/R2)+1). Figure 4-1.
ADJ *
≥ V
IN
OUT(MAX)
OUT-HIGH
IN = VOUTMAX
, TJ, θJA). Exceeding the maximum allowable power
A
+ V
DROPOUT(MAX).
is the highest voltage measured over the
+ V
DROPOUT(MAX)
OUT
=2.3V
< 2.3V, I
IN
< 2.5V Fixed, V >= 2.5V Fixed
= VIN = 6.0V
= 10 kΩ
or V
OUT
PWRGD_TH
= GND
= GND to 95% VR
= 200 mA, f = 1 kHz, C
.
= 1.5A,
SINK
= 1.2 mA,
= V
PWRGD_TH
= 100 µA
= Adj.
OUT
+
- 20 mV
OUT
OUT
=
© 2007 Microchip Technology Inc. DS22001C-page 7
MCP1827/MCP1827S
AC/DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise noted, V
I
= 1 mA, CIN = C
OUT
-40°C to +125°C
= 4.7 µF (X7R Ceramic), TA = +25°C. Boldface type applies for junction temperatures, TJ (Note 7) of
OUT
Parameters Sym Min Typ Max Units Conditions
Power Supply Ripple Rejection
PSRR — 60 — dB f = 100 Hz, C
Ratio
Thermal Shutdown Temperature T
Thermal Shutdown Hysteresis
Note 1: The minimum V
must meet two conditions: V
IN
ΔT
SD
SD
2: VR is the nominal regulator output voltage for the fixed cases. VR = 1.2V, 1.8V, etc. VR is the desired set point output
voltage for the adjustable cases. V
3: TCV
= (V
OUT
OUT-HIGH
temperature range. V
– V
OUT-LOW
R
) *106 / (VR * ΔTemperature). V
OUT-LOW
is the lowest voltage measured over the temperature range.
4: Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is
tested over a load range from 1 mA to the maximum specified output current.
5: Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its
nominal value that was measured with an input voltage of V
6: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction
temperature and the thermal resistance from junction to air. (i.e., T dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained junction temperatures above 150°C can impact device reliability.
7: The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the
desired junction temperature. The test time is small enough such that the rise in the junction temperature over the ambient temperature is not significant.
= V
IN
= V
OUT(MAX)
+ V
DROPOUT(MAX)
Note 1, VR=1.8V for Adjustable Output,
— 150 — °C I
—10—°CI
≥ 2.3V and V
IN
((R1/R2)+1). Figure 4-1.
ADJ *
≥ V
IN
OUT(MAX)
OUT-HIGH
IN = VOUTMAX
, TJ, θJA). Exceeding the maximum allowable power
A
+ V
DROPOUT(MAX).
is the highest voltage measured over the
+ V
DROPOUT(MAX)
I
= 10 mA,
OUT
V
= 30 mV pk-pk,
INAC
C
= 0 µF
IN
= 100 µA, V
OUT
V
= 2.8V
IN
= 100 µA, V
OUT
V
= 2.8V
IN
.
OUT
= 10 µF,
= 1.8V,
OUT
= 1.8V,
OUT
TEMPERATURE SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, all limits apply for V
Parameters Sym Min Typ Max Units Conditions
Temperature Ranges
Operating Junction Temperature Range T Maximum Junction Temperature T Storage Temperature Range T
Thermal Package Resistances
Thermal Resistance, 5LD DDPAK θ Thermal Resistance, 3LD DDPAK θ Thermal Resistance, 5LD TO-220 θ Thermal Resistance, 3LD TO-220 θ
J
J
A
JA
JA
JA
JA
-40 — +125 °C Steady State — — +150 °C Transient
-65 — +150 °C
— 31.2 — °C/W 4-Layer JC51 Standard Board — 31.4 — °C/W 4-Layer JC51 Standard Board — 29.3 — °C/W 4-Layer JC51 Standard Board — 29.4 — °C/W 4-Layer JC51 Standard Board
= 2.3V to 6.0V.
IN
DS22001C-page 8 © 2007 Microchip Technology Inc.
MCP1827/MCP1827S
90
100
110
120
130
140
150
23456
Input Voltage (V)
Quiescent Current (μA)
130°C
-45
°C
25
°C
90°C
V
OUT
= 1.2V Adj
I
OUT
= 0 mA
100
110
120
130
140
150
160
170
180
190
200
0 250 500 750 1000 1250 1500
Load Current (mA)
Ground Current (µA)
VIN=3.3V
V
OUT
= 1.2V Adj
VIN=5.0V
VIN=2.3V
100
105
110
115
120
125
130
135
140
-45 -20 5 30 55 80 105 130
Temperature (°C)
Quiescent Current (μA)
VIN=5.0V
VIN=2.5V
VIN=4.0V
I
OUT
= 0 mA
V
OUT
= 1.2V Adj
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
-45-20 5 305580105130
Temperature (°C)
Line Regulation (%/V)
V
OUT
V
IN
I
OUT
= 1 mA
I
OUT
= 500 mA
I
OUT
= 1000 mA
I
OUT
= 100 mA
-0.15
-0.10
-0.05
0.00
0.05
0.10
0.15
-45-20 5 305580105130
Temperature (°C)
Load Regulation (%)
I
OUT
= 1.0 mA to 1500 mA
V
OUT
= 5.0V
V
OUT
= 3.3V
V
OUT
= 0.8V
V
OUT
= 1.8V
0.408
0.409
0.409
0.410
0.410
0.411
-45 -20 5 30 55 80 105 130
Temperature (°C)
Adjust Pin Voltage (V)
I
OUT
= 1.0 mA
VIN = 6.0V
VIN = 2.3V
VIN = 5.0V
2.0 TYPICAL PERFORMANCE CURVES
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, V Ceramic (X7R), I
Note: Junction Temperature (T
= 1 mA, Temperature = +25°C, VIN = V
OUT
) is approximated by soaking the device under test to an ambient temperature equal to
J
the desired Junction temperature. The test time is small enough such that the rise in Junction temperature over the Ambient temperature is not significant.
= 1.8V (Adjustable), VIN = 2.8V, C
OUT
OUT
+ 0.6V, R
= 4.7 µF Ceramic (X7R), CIN = 4.7 µF
OUT
= 10 kΩ To VIN.
PWRGD
= 2.3V to 6.0V
= 1.2V adj

FIGURE 2-1: Quiescent Current vs. Input Voltage (1.2V Adjustable).

FIGURE 2-2: Ground Current vs. Load Current (1.2V Adjustable).

FIGURE 2-4: Line Regulation vs. Temperature (1.2V Adjustable).

FIGURE 2-5: Load Regulation vs. Temperature (Adjstable Version).

FIGURE 2-3: Quiescent Current vs. Junction Temperature (1.2V Adjustable).

© 2007 Microchip Technology Inc. DS22001C-page 9

FIGURE 2-6: Adjust Pin Voltage vs. Temperature.

MCP1827/MCP1827S
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0 250 500 750 1000 1250 1500
Load Current (mA)
Dropout Voltage (V)
V
OUT
= 2.5V Adj
V
OUT
= 5.0V Adj
0.30
0.32
0.34
0.36
0.38
0.40
0.42
-45 -20 5 30 55 80 105 130
Temperature (°C)
Dropout Voltage (V)
V
OUT
= 3.3V Adj
V
OUT
= 5.0V Adj
V
OUT
= 2.5V Adj
I
OUT
= 1.5A
300
310
320
330
340
350
360
370
-45 -20 5 30 55 80 105 130 Temperature (°C)
Power Good Time Delay (µs)
V
OUT
= 3.3V Fixed
VIN = 3.9V
VIN = 5.0V
VIN = 4.5V
80
90
100
110
120
130
140
150
23456
Input Voltage (V)
Quiescent Current (μA)
-45°C
+130°C
+85°C
+25°C
V
OUT
= 0.8V
I
OUT
= 0 mA
80
90
100
110
120
130
140
150
33.544.555.56
Input Voltage (V)
Quiescent Current (μA)
V
OUT
= 2.5V
I
OUT
= 0 mA
+130
°C
-45
°C
+25
°C
+90
°C
0.00
50.00
100.00
150.00
200.00
250.00
0 250 500 750 1000 1250 1500
Load Current (mA)
Ground Current (μA)
V
IN
= 2.3V for V
R
VIN = 3.1V for V
R
V
OUT
=0.8V
V
OUT
=2.5V
Note: Unless otherwise indicated, V
Ceramic (X7R), I
= 1 mA, Temperature = +25°C, VIN = V
OUT
= 1.8V (Adjustable), VIN = 2.8V, C
OUT

FIGURE 2-7: Dropout Voltage vs. Load Current (Adjustable Version).

= 4.7 µF Ceramic (X7R), CIN = 4.7 µF
+ 0.6V, R
OUT
OUT
= 10 kΩ To VIN.
PWRGD

FIGURE 2-10: Quiescent Current vs. Input Voltage (0.8V Fixed).

FIGURE 2-8: Dropout Voltage vs. Temperature (Adjustable Version).

FIGURE 2-9: Power Good (PWRGD) Time Delay vs. Temperature (Adjustable Version).

DS22001C-page 10 © 2007 Microchip Technology Inc.

FIGURE 2-11: Quiescent Current vs. Input Voltage (2.5V Fixed).

=0.8V =2.5V

FIGURE 2-12: Ground Current vs. Load Current.

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